APA (7th ed.) Citation

Rommel, G. M. (1920). Essentials of animal breeding. U.S. Dept. of Agriculture.

Chicago Style (17th ed.) Citation

Rommel, George M. Essentials of Animal Breeding. Washington, D.C: U.S. Dept. of Agriculture, 1920.

MLA (9th ed.) Citation

Rommel, George M. Essentials of Animal Breeding. U.S. Dept. of Agriculture, 1920.