Cita APA (7th ed.)

Zim, H. S. (1964). The Rocky mountains: A golden regional guide. Golden Press.

Cita Chicago (17th ed.)

Zim, Herbert S. The Rocky Mountains: A Golden Regional Guide. New York: Golden Press, 1964.

Cita MLA (9th ed.)

Zim, Herbert S. The Rocky Mountains: A Golden Regional Guide. Golden Press, 1964.