APA (7th ed.) Citation

Zim, H. S., & Gabrielson, I. N. (1956). Birds: A guide to the most familiar american birds. Simon and Schuster.

Chicago Style (17th ed.) Citation

Zim, Herbert S., and Ira N. Gabrielson. Birds: A Guide to the Most Familiar American Birds. Nueva York: Simon and Schuster, 1956.

MLA (9th ed.) Citation

Zim, Herbert S., and Ira N. Gabrielson. Birds: A Guide to the Most Familiar American Birds. Simon and Schuster, 1956.