Cita APA (7a ed.)

Griffiths, A. P. (1989). Key themes in philosophy. University Press.

Cita Chicago Style (17a ed.)

Griffiths, A. Phillips. Key Themes in Philosophy. Cambridge [etc.]: University Press, 1989.

Cita MLA (9a ed.)

Griffiths, A. Phillips. Key Themes in Philosophy. University Press, 1989.