Cita APA (7a ed.)

Douglas, W. O. (1950). Of men and mountains ([1st ed.].). Harper.

Cita Chicago Style (17a ed.)

Douglas, William O. Of Men and Mountains. [1st ed.]. New York: Harper, 1950.

Cita MLA (8a ed.)

Douglas, William O. Of Men and Mountains. [1st ed.]. Harper, 1950.

Precaución: Estas citas no son 100% exactas.