APA-referens (7:e uppl.)

Ridley, M. (1996). Evolution (Second edition.). Blackwell Science.

Chicago-referens (17:e uppl.)

Ridley, Mark. Evolution. Second edition. Cambridge: Blackwell Science, 1996.

MLA-referens (9:e uppl.)

Ridley, Mark. Evolution. Second edition. Blackwell Science, 1996.