Cita APA (7a ed.)

Longwell, C. R., Knopf, A., & Flint, F. (1949). Physical Geology (3d. ed.). John Wiley and Sons.

Cita Chicago Style (17a ed.)

Longwell, Chester R., Adolph Knopf, y F. Flint. Physical Geology. 3d. ed. New York: John Wiley and Sons, 1949.

Cita MLA (8a ed.)

Longwell, Chester R., et al. Physical Geology. 3d. ed. John Wiley and Sons, 1949.