APA استشهاد

Grayling, A. C. (2008). Scepticism and the possibility of knowledge. Continuum.

استشهاد بنمط شيكاغو

Grayling, A C. Scepticism and the Possibility of Knowledge. London: Continuum, 2008.

MLA استشهاد

Grayling, A C. Scepticism and the Possibility of Knowledge. Continuum, 2008.