APA (7th ed.) Citation

Snodgrass, R. E. (1935). Principles of insect entomology (1st ed., 7th imp.). McGraw-Hill Book Co., Inc.

Chicago Style (17th ed.) Citation

Snodgrass, R. E. Principles of Insect Entomology. 1st ed., 7th imp. New York: McGraw-Hill Book Co., Inc, 1935.

MLA (9th ed.) Citation

Snodgrass, R. E. Principles of Insect Entomology. 1st ed., 7th imp. McGraw-Hill Book Co., Inc, 1935.