Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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