APA (7th ed.) Citation

Essig, E. O. (1972). A history of entomology / by E.O. Essig. Hafner.

Chicago Style (17th ed.) Citation

Essig, E. O. A History of Entomology / by E.O. Essig. New York: Hafner, 1972.

MLA (9th ed.) Citation

Essig, E. O. A History of Entomology / by E.O. Essig. Hafner, 1972.

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