Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.