1. Aristotle 2004. Nicomachean Ethics, tans. and edited by Roger Crisp, Cambridge, Cambridge University Press.
2. Behrens, K. 2011. African Philosophy, Thought and Practice, and their Contribution to Environmental Ethics. PhD Thesis, Faculty of Humanities at the University of Johannesburg.
3. Behrens, K. 2014. Toward an African Relational Environmentalism. In Ontologized Ethics: New Essays in African Meta-Ethics, ed. Imafidon, E. and Bewaji, J.A., 55–72. Lanham: Lexington Books.
4. Bewaji, John Ayotunde Isola 2004. Ethics and Morality in Yoruba Culture. In A Companion to African Philosophy, ed. Wiredu, Kwasi, 396–403. Oxford: Blackwell.
5. Bujo, B. 1998. The Ethical Dimension of Community: The African Model and the Dialogue between North and South. Nairobi: Paulines Publications.