(1979). Catalogue / Hellmut Schumann AG. Catalogue / Hellmut Schumann AG.
Chicago Style (17th ed.) Citation"Catalogue / Hellmut Schumann AG." Catalogue / Hellmut Schumann AG 1979.
MLA (8th ed.) Citation"Catalogue / Hellmut Schumann AG." Catalogue / Hellmut Schumann AG, 1979.
Warning: These citations may not always be 100% accurate.