APA-referens (7:e uppl.)

singer, p. (1993). Practical Ethics (2nd.). cambridge University Press.

Chicago-referens (17:e uppl.)

singer, peter. Practical Ethics. 2nd. Cambridge: cambridge University Press, 1993.

MLA-referens (9:e uppl.)

singer, peter. Practical Ethics. 2nd. cambridge University Press, 1993.