Dyfyniad APA

Singer, P. (1997). How are we to live?: Ethics in an age of self-interest (Oxford ed.). Oxford University Press.

Dyfyniad Arddull Chicago

Singer, Peter. How Are We to Live?: Ethics in an Age of Self-interest. Oxford ed. Oxford: Oxford University Press, 1997.

Dyfyniad MLA

Singer, Peter. How Are We to Live?: Ethics in an Age of Self-interest. Oxford ed. Oxford University Press, 1997.

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