Glasmeier, M., & Binder, U. (1997). Was ist. Salon Verl..
Cita Chicago (17th ed.)Glasmeier, Michael, i Ursula Binder. Was Ist. Köln: Salon Verl., 1997.
Cita MLA (8th ed.)Glasmeier, Michael, i Ursula Binder. Was Ist. Salon Verl., 1997.
Atenció: Aquestes cites poden no estar 100% correctes.