APA ציטוט

Douglas, W. O. (1950). Of men and mountains. New York: Happer and Brothers Publishers.

Trích dẫn kiểu Chicago

Douglas, William O. Of Men and Mountains. New York: Happer and Brothers Publishers, 1950.

ציטוט MLA

Douglas, William O. Of Men and Mountains. New York: Happer and Brothers Publishers, 1950.