Cita APA (7a ed.)
Barnes, H. E., & David, H. (1935). The history of western civilization. Harcourt.
Cita Chicago Style (17a ed.)
Barnes, Harry Elmer, y Henry David. The History of Western Civilization. New York: Harcourt, 1935.
Cita MLA (9a ed.)
Barnes, Harry Elmer, y Henry David. The History of Western Civilization. Harcourt, 1935.
Precaución: Estas citas no son 100% exactas.