APA-Zitierstil (7. Ausg.)

Bolton, H. E. (1939). Wider horizons of America history. D. Appleton-Century.

Chicago-Zitierstil (17. Ausg.)

Bolton, Herbert Eugene. Wider Horizons of America History. New York: D. Appleton-Century, 1939.

MLA-Zitierstil (9. Ausg.)

Bolton, Herbert Eugene. Wider Horizons of America History. D. Appleton-Century, 1939.