Cita APA (7a ed.)

Longwell, C. R., Knofp, A., & Flint, R. F. (1948). Physical geology (3.).

Cita Chicago Style (17a ed.)

Longwell, Chester R., Adolph Knofp, y Richard F. Flint. Physical Geology. 3. New York, New York : Willey, 1948.

Cita MLA (9a ed.)

Longwell, Chester R., et al. Physical Geology. 3. 1948.