APA (7th ed.) Citation

Greenewalt, C. H. (1960). Hummingbirds. Published for the American Museum of Natural History by Doubleday.

Chicago Style (17th ed.) Citation

Greenewalt, Crawford H. Hummingbirds. Garden City, N.Y.: Published for the American Museum of Natural History by Doubleday, 1960.

MLA (9th ed.) Citation

Greenewalt, Crawford H. Hummingbirds. Published for the American Museum of Natural History by Doubleday, 1960.