Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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