APA (7th ed.) Citation

Longwell, C. R., Knopf, A., & Flint, R. F. (1948). Physical geology (3rd ed.). Wiley.

Chicago Style (17th ed.) Citation

Longwell, Chester R., Adolph Knopf, and Richard Foster Flint. Physical Geology. 3rd ed. New York: Wiley, 1948.

MLA (8th ed.) Citation

Longwell, Chester R., et al. Physical Geology. 3rd ed. Wiley, 1948.