Παραπομπή APA

Burnie, D. (2012). Birds of the world. Dorling kindersley.

Παραπομπή Chicago Style

Burnie, David. Birds of the World. London: Dorling kindersley, 2012.

Παραπομπή MLA

Burnie, David. Birds of the World. Dorling kindersley, 2012.