Aguilar IM (1996). Keeping the Peace of the Waso Boorana', in Being and Becoming Oromo: Historical and Anthropological Enquires. USA: red Sea Press pp. 190-202.

Barker K (Ed.), (2008). NIV Study Bible. Grand Rapids: Zondervan.

Bartels L (1989). Oromo Religion: Myths and Rites of the Western Oromo of Ethiopiaan Attempt to Understand: Berlin. Dietrich Riemer Verlag.

Baxter WTP, Hultin J, Triulzi A (1996). Being and Becoming Oromo: Historical and Anthropological Enquiries. USA: Red Sea Press.

Bokku DD (2011). Oromo Wisdom in Black Civilization. Oromia: Finfinnee.

Bongmba KE (2012).The Wiley-Blackwell Companion to African Religions: UK: A John Wiley & Sons, Inc. Publishing Limited.

Brookryk J (2002). Ubuntu: Life Lessons from Africa: Pretoria: Ubuntu School of Philosophy.

Bulcha M (2011). Contours of the Emergent & Ancient Oromo Nation: Dilemmas in the Ethiopian Politics of State and Nation-Building, Cape Town: Creda Communications.

Bulcha M (2005). The Making of Oromo Diaspora: A Historical Sociology of Forced Migration.Minnesota: Kirk House Publishers. Busha SN, Umar DD, Gonfa B, Haile A (1998). History of the Oromo to the Sixteenth Century.

Choma, IA (2001). "The Meaning of blood in Oromo Culture and its Significance for ministry of the Church in Oromo Areas", MA Thesis submitted to the NorwegianSchool of Theology, Norway: Oslo.

Oromia: Finfinnee. Choma IA (2001). The Meaning of blood in Oromo Culture and its Significance for ministry of the Church in Oromo Areas", MA Thesis submitted to the Norwegian School of Theology, Norway: Oslo.

Cortright D (2008). Peace: A History of Movements and Ideas. USA: Cambridge University Press.
Crossref

Dawit O (2004). Parallelisms between charismatic prophecy in EECMY and Qaalluu Institution in Oromo Traditional Religion. MYTS, Addis Ababa, Ethiopia.

De Salviac M (2005/1901). An Ancient People Great African Nation: Translation from the Original. Oromia: Cultural and Tourism Bureau.

Dugo M (2001). Gadaa and Christianity: Can Christians undergo Gada Initiation Rites? With Special references to Gadaa of Gijji-Oromo in Southern Ethiopia. MA Thesis submitted to The Norwegian Teacher Academy, Bergen, Norway.

Eide ØM (2000). Revolution and Religion in Ethiopia. The growth and Persecution of the Mekane Yesus, Addis Ababa University Press.

Eide ØM (1996). Revolution and Religion in Ethiopia: An Analysis of the Dynamicsbetween Mission, Church and Society from 1866 ton1991. London: SMT.

Erickson JM (1998). Christian Theology, Michigan: Backer Academic.

Etefa T (2012). Integration and peace in East Africa: A History of the Oromo Nation, New York: Palgrave Macmillan.
Crossref

Gadaa M (1999). Oromia: An Introduction to the History of the Oromo People. Minnesota:Kirk House Publishers.

Gade NBC (2013). Ubuntu and Restorative Justice. Addressing the Strife and Divisions The Past in Post-Apartheid South Africa. PhD Dissertations Submitted to the Department of Culture, Society and Philosophy Sections, Aarhus University, Denmark.

Gemechu CD (2002). Some Aspects of Conflict and Conflict Resolution among Waliso Oromo of the Eastern Macha, with particular emphasis on Guma. MA Thesis Submitted to the Graduate Studies, Addis Ababa University. In partial fulfilment of the requirement for the Degree master of Arts in Social Anthropology. Addis Ababa.

Gemechu M (1996). 'Oromummaa: Tradition, Consciousness and Identity in Being andBecoming Oromo: Historical and Anthropological Enquiries. USA: Red Sea Press pp.92-103.

Gnamo HA (2013). Conquest and Resistance in the Ethiopia Empire, 1880-1974: The Case Case of the Arsi Oromo. Leiden: Brill.

Hailey J (2008). Ubuntu: A Literature Review. A paper Prepared for the Tutu Foundation.UK: London.

Hankela E (2014). Ubuntu, Migration and Ministry: Being Human in a Johannesburg Church. Leiden: Brill.
Crossref

Hatang S, Venetr S (Eds.), (2013). Nelson Mandela by Himself: The Authorized Book of Questions. Johannesburg: Pan Macmillan.

Hiebert GP (2008). Transforming Worldview: An Anthropological Understanding of How People Change. Grand Rapids: Baker Academic.

Hinnant J (1978). The Guji: Gadaa as a ritual system", in P.T.W. Baxter and U. Almagor. (Eds.), Age, generation and time: Some features of east Africa Age organizations, London: C. Hurst & Co. pp. 207-242.

Jalata A (2002). Fighting Against the Injustice of the State and Globalization: Comparing the African American and Oromo Movements. USA: Palgrave Macmillan.

Jalata A (1998). Oromo Nationalism and the Ethiopian Discourse: The Search for Freedom and Democracy.

Jalata A (19973). Oromia & Ethiopian State Formation and Ethnonational Conflict, 1869-1992.

Jalata A (2007). Oromummaa: Oromo Culture, Identity & Nationalism. Atlanta: Oromia Publishing Company.

Jalata A (1993). Oromia and Ethiopian State Formation and Ethnonational Conflict, 1869-1992. Landon: Lynne Rienner Publishers.

Jalata A, Schaffer H (2013). The Oromo, Gadaa/Siqqee Democracy and Liberation of Ethiopian Colonial Subjects. 

Kelbessa W (2011). Indigenous and Modern Environmental Ethics: a study of the Indigenous Oromo Environment and Development, Ethiopian Philosophical Studies, I.USA: the Council for Research in Values and Philosophy.

Kelbessa W (2011). Indigenous and Modern Environmental Ethics: a study of the Indigenous Oromo Environment and Development, Ethiopian Philosophical Studies, I.USA: the Council for Research in Values and Philosophy.

Knutsson KE (1967). Authority and Change: the study of the qaluu institution among the Macha Gala of Ethiopia. Gotenborg: Ethnografiska Museet.

Kuwe K (1997). 'The Siqqee Institution of Oromo Woman' in Journal of

Legesse A (1973). Gadaa: Three Approaches to the Study of African Society. London:Collier-Macmillan Publishing Comp. C. Inc.

Lenkabula P (2008). "Beyond Anthropocentricity-Botho/Ubuntu and quest for economic And ecological Justice in Africa", in Religion and Theology 15:375-394.
Crossref

Mangalismo M (2001). "Building competitive advantage from Ubuntu: Management lessonsFrom South Africa", in Academy of management Executive. pp.15:3

Marshall C (2011).Justice, Restorative", in Green, J.B (Ed.), Dictionary of Scripture and Ethics. Grandi Rapids: Baker Academics. Masango SJM (2006). African Spirituality that Shares the Concept of Ubuntu", in VERBUM ET JRG. 27(3).

Mbiti SJ (2008). African Religions and Philosophy. Harlow: Heinemann.

Miller Ed L (1996). Questions that Matter: An Invitation to Philosophy. USA: Mc Graw-Hill Com.

Murithi T (2006). Practical Peacemaking. Wisdom from Africa: Reflections on Ubuntu",in Journal of Pan African Studies pp.1.4.

Nyathu N (2004). The Ubuntu Dialogue: Decolonizing Discourse and Dualism in Organization Studies. Masters Thesis submitted to Warwick University, UK.

Nussbaum B (2003). The Ubuntu: Reflections of a South African on our common humanity.Massachusetts Institute of Technology pp 4-4.
Crossref

Ramose BM (2002). Discourses on Africa: Introduction the struggle for reason in Africa, in the African Philosophy Reader. 2nd ed. by Roux, J.P.A &

Savory P (1988). The best of African Folklore Cape Town: Struik Publishers.

Ta'a T (1980). "The Oromo of Wollaga: A Historical Survy to 1910". Unpublished M.A Thesis. Ethiopia: Addis Ababa University.

Temesgen SN (2015). The Influence of Evangelical Christianity on the Developmentof the Oromo language in Ethiopia. PhD Dissertation submitted to University of South Africa, South Africa.

Tutu D (1999). Now Future without Forgiveness. New York: Random House.

Wake JG (2018). Encounters between Waaqeffannaa and Evangelical Christianity Among the Oromo: Contextual Theology and Religious Studies. Master Thesis submitted to Theology Faculty at the University of Oslo, Oslo.

Wake JG (2016a). Peace and Justice in African Philosophy: Analysis of the Concepts of Peace and Justice in the Oromo Gadaa System. Master Thesis submitted to the Norwegian School of Theology, Oslo.

Wake JG (2016b). Religion and Politics in the Horn of Africa: Evangelical Christianity and Politics in the Oromo Context in Ethiopia, a glimpse of Oromian Liberation Theology. Stockholm: Forfattares Bokmaskin.

Wake JG (2015): Comparing and Contrasting the Role of Christianity and WaaqeffannaaConcerning Reconciliation in Oromia, Ethiopia. MA Thesis Submitted to the Norwegian School of Theology, Oslo.

Wiirtuu Qo'annoo fi Qorannoo Afaanota Itephiyaa Yunversitii Finfinnee (1996/1988): Galmee Jechoota Afaan Oromoo. Ethiopian Language Research Center,Addis Ababa University, Addis Ababa.