APA (7th ed.) Citation

Spellenberg, R. (1979). National Audubon Society field guide to North American wildflowers (Western region, a Chanticleer Press Edition.). Alfred A. Knopf.

Chicago Style (17th ed.) Citation

Spellenberg, Richard. National Audubon Society Field Guide to North American Wildflowers. Western region, a Chanticleer Press Edition. New York: Alfred A. Knopf, 1979.

MLA (9th ed.) Citation

Spellenberg, Richard. National Audubon Society Field Guide to North American Wildflowers. Western region, a Chanticleer Press Edition. Alfred A. Knopf, 1979.