APA (7th ed.) Citation

Comstock, J. H., & Comstock, A. B. (1888). An introduction to entomology. The author.

Chicago Style (17th ed.) Citation

Comstock, John Henry, and Anna Botsford Comstock. An Introduction to Entomology. Ithaca, N.Y.: The author, 1888.

MLA (9th ed.) Citation

Comstock, John Henry, and Anna Botsford Comstock. An Introduction to Entomology. The author, 1888.