APA استشهاد

Lohr, R., & Bell, A. (2007). Secrets of the chess machine. Fig Tree.

استشهاد بنمط شيكاغو

Lohr, Robert, و Anthea Bell. Secrets of the Chess Machine. London: Fig Tree, 2007.

MLA استشهاد

Lohr, Robert, و Anthea Bell. Secrets of the Chess Machine. Fig Tree, 2007.