APA (7th ed.) Citation

Longwell, C. R., & Knopf, A. (1937). Outlines of geology. Wiley [u.a.].

Chicago Style (17th ed.) Citation

Longwell, Chester R., and Adolph Knopf. Outlines of Geology. New York: Wiley [u.a.], 1937.

MLA (9th ed.) Citation

Longwell, Chester R., and Adolph Knopf. Outlines of Geology. Wiley [u.a.], 1937.