APA সাইটেশন

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

শিকাগো স্টাইলে সাইটেশন

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

এমএলএ সাইটেশন

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