APA (7th ed.) Citation

Perrins, C. M. (1990). The illustrated encyclopedia of birds: The definitive reference to birds of the world. Prentice Hall.

Chicago Style (17th ed.) Citation

Perrins, Christopher M. The Illustrated Encyclopedia of Birds: The Definitive Reference to Birds of the World. New York: Prentice Hall, 1990.

MLA (9th ed.) Citation

Perrins, Christopher M. The Illustrated Encyclopedia of Birds: The Definitive Reference to Birds of the World. Prentice Hall, 1990.