APA

Griffiths A. P., . (1989). KEY themes in philosophy. Cambridge: University Press.

Chicago

Griffiths Allen Phillips, . 1989. KEY themes in philosophy. Cambridge: University Press.

Harvard

Griffiths A. P., . (1989). KEY themes in philosophy. Cambridge: University Press.

MLA

Griffiths Allen Phillips, . KEY themes in philosophy. Cambridge: University Press. 1989.