Citazione Stile APA (7a Edizione)

Singer, P. (1991). A Companion to ethics. Blackwell Reference.

Citazione stile Chigago Style (17a edizione)

Singer, Peter. A Companion to Ethics. Oxford, UK ; Cambridge, Mass., USA: Blackwell Reference, 1991.

Citatione MLA (9a ed.)

Singer, Peter. A Companion to Ethics. Blackwell Reference, 1991.