APA (7th ed.) Citation

Edwards, W. H. (1884). The butterflies of North America. Houghton.

Chicago Style (17th ed.) Citation

Edwards, William Henry. The Butterflies of North America. Boston: Houghton, 1884.

MLA (9th ed.) Citation

Edwards, William Henry. The Butterflies of North America. Houghton, 1884.

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