APA (7th ed.) Citation

Longwell, C. R., Knopf, A., Flint, R. F., Schuchert, C., Dunbar, C. O., & Pirsson, L. V. (1939). A textbook of geology (2d (rev.) ed.). J. Wiley.

Chicago Style (17th ed.) Citation

Longwell, Chester R., Adolph Knopf, Richard Foster Flint, Charles Schuchert, Carl O. Dunbar, and Louis V. Pirsson. A Textbook of Geology. 2d (rev.) ed. New York: J. Wiley, 1939.

MLA (9th ed.) Citation

Longwell, Chester R., et al. A Textbook of Geology. 2d (rev.) ed. J. Wiley, 1939.