Cita APA

Singer, P. (1991). A Companion to ethics (First published.). Oxford, UK ; Blackwell Reference, Cambridge, Mass., USA: Blackwell Reference.

Citación estilo Chicago

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

Cita MLA

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