APA-viite (7. p.)

Willett, C. (2014). Interspecies ethic. Columbia University Press.

Chicago-viite (17. p.)

Willett, Cynthia. Interspecies Ethic. New York: Columbia University Press, 2014.

MLA-viite (9. p.)

Willett, Cynthia. Interspecies Ethic. Columbia University Press, 2014.