Παραπομπή σε μορφή APA (7η εκδ.)

Gemar-Koeltzsch, E., & Heibel, Y. F. (1998). German marks: Postwar drawings and prints donated to the Busch-Reisinger Museum through the German Art Dealers Association.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Gemar-Koeltzsch, Erika, και Yule F. Heibel. German Marks: Postwar Drawings and Prints Donated to the Busch-Reisinger Museum Through the German Art Dealers Association. Cambridge, Massachusetts, 1998.

Παραπομπή σε μορφή MLA (8th εκδ.)

Gemar-Koeltzsch, Erika, και Yule F. Heibel. German Marks: Postwar Drawings and Prints Donated to the Busch-Reisinger Museum Through the German Art Dealers Association. 1998.