APA (7th ed.) Citation

(1990). The Illustrated encyclopedia of birds: The definitive guide to birds of the world. Headline.

Chicago Style (17th ed.) Citation

The Illustrated Encyclopedia of Birds: The Definitive Guide to Birds of the World. London: Headline, 1990.

MLA (9th ed.) Citation

The Illustrated Encyclopedia of Birds: The Definitive Guide to Birds of the World. Headline, 1990.

Warning: These citations may not always be 100% accurate.