APA-viite (7. p.)

Boff, L. (2008). Essential care: An ethics of human nature. Baylor University Press.

Chicago-viite (17. p.)

Boff, Leonardo. Essential Care: An Ethics of Human Nature. Waco, TX: Baylor University Press, 2008.

MLA-viite (9. p.)

Boff, Leonardo. Essential Care: An Ethics of Human Nature. Baylor University Press, 2008.