Παραπομπή APA

Sterba, G. (1973). Freshwater fishes of the world.

Παραπομπή Chicago Style

Sterba, Gunther. Freshwater Fishes of the World. TFH Publications Inc, 1973.

Παραπομπή MLA

Sterba, Gunther. Freshwater Fishes of the World. 1973.