Cita APA (7th ed.)
Douglas, W. O. (1942). Being an American: (Rev. ed.). Day.
Cita Chicago (17th ed.)
Douglas, William Orville. Being an American: (Rev. Ed.). New York: Day, 1942.
Cita MLA (9th ed.)
Douglas, William Orville. Being an American: (Rev. Ed.). Day, 1942.
Atenció: Aquestes cites poden no estar 100% correctes.