Citazione Stile APA (7a Edizione)

Rugh, R. (1951). The Frog: Its reproduction and development. McGraw-Hill Book Co., Inc.

Citazione stile Chigago Style (17a edizione)

Rugh, Roberts. The Frog: Its Reproduction and Development. New Delhi: McGraw-Hill Book Co., Inc, 1951.

Citatione MLA (9a ed.)

Rugh, Roberts. The Frog: Its Reproduction and Development. McGraw-Hill Book Co., Inc, 1951.