APA (7th ed.) Citation

Helgen, K. M. (2019). Audubon's animals: The viviparous quadrupeds of North America. Rizzoli Electa.

Chicago Style (17th ed.) Citation

Helgen, Kristofer M. Audubon's Animals: The Viviparous Quadrupeds of North America. New York, NY: Rizzoli Electa, 2019.

MLA (9th ed.) Citation

Helgen, Kristofer M. Audubon's Animals: The Viviparous Quadrupeds of North America. Rizzoli Electa, 2019.

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