(1991). Geiger, Gruchot, Harnest, Marek.
Cita Chicago (17th ed.)Geiger, Gruchot, Harnest, Marek. München, 1991.
Cita MLA (8th ed.)Geiger, Gruchot, Harnest, Marek. 1991.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)