APA-Zitierstil (7. Ausg.)

Whitney, N. (1997). Open doors: Student's book. Oxford University Press.

Chicago-Zitierstil (17. Ausg.)

Whitney, Norman. Open Doors: Student's Book. New York, EUA: Oxford University Press, 1997.

MLA-Zitierstil (9. Ausg.)

Whitney, Norman. Open Doors: Student's Book. Oxford University Press, 1997.