APA (7th ed.) Citation

Edwards, W. H. (1897). The butterflies of North America. Houghton, Mifflin and Company.

Chicago Style (17th ed.) Citation

Edwards, William Henry. The Butterflies of North America. Boston, New York: Houghton, Mifflin and Company, 1897.

MLA (9th ed.) Citation

Edwards, William Henry. The Butterflies of North America. Houghton, Mifflin and Company, 1897.