Haupt, H., & Wesselborg, I. (1990). Sekretariatspraxis heute. Winklers.
Chicago Style (17th ed.) CitationHaupt, Heinz, and Inge Wesselborg. Sekretariatspraxis Heute. Darmstadt: Winklers, 1990.
MLA (9th ed.) CitationHaupt, Heinz, and Inge Wesselborg. Sekretariatspraxis Heute. Winklers, 1990.
Warning: These citations may not always be 100% accurate.