Singer, P. (1993). Practical ethics (Second edition.). Cambridge University Press.
Čikaški stil citiranja (17. izdanje)Singer, Peter. Practical Ethics. Second edition. Cambridge, New York: Cambridge University Press, 1993.
MLA način citiranja (9. izdanje)Singer, Peter. Practical Ethics. Second edition. Cambridge University Press, 1993.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.