APA (7th ed.) Citation

Pyle, R. M. (1981). The Audubon Society field guide to North American butterflies (A Chanticleer Press ed.). Knopf.

Chicago Style (17th ed.) Citation

Pyle, Robert Michael. The Audubon Society Field Guide to North American Butterflies. A Chanticleer Press ed. New York: Knopf, 1981.

MLA (9th ed.) Citation

Pyle, Robert Michael. The Audubon Society Field Guide to North American Butterflies. A Chanticleer Press ed. Knopf, 1981.