APA (7th ed.) Citation

Dohrs, F. E., & Sommers, L. M. (1967). Introduction to geography: Selected readings. Crowell.

Chicago Style (17th ed.) Citation

Dohrs, Fred E., and Lawrence M. Sommers. Introduction to Geography: Selected Readings. New York: Crowell, 1967.

MLA (9th ed.) Citation

Dohrs, Fred E., and Lawrence M. Sommers. Introduction to Geography: Selected Readings. Crowell, 1967.