APA (7th ed.) Zitazioa
Boff, L. (2008). Essential care: An ethics of human nature. Baylor University Press.
Chicago Style (17th ed.) Zitazioa
Boff, Leonardo. Essential Care: An Ethics of Human Nature. Waco, TX: Baylor University Press, 2008.
MLA (9th ed.) Zitazioa
Boff, Leonardo. Essential Care: An Ethics of Human Nature. Baylor University Press, 2008.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.