Pohl, H., Thelen, A., & Kleinertz, L. (1928). Bürgerkunde (31. - 40. Tsd.). DuMont-Schauberg.
Chicago Style (17th ed.) CitationPohl, Heinrich, Arn Thelen, and Ludwig Kleinertz. Bürgerkunde. 31. - 40. Tsd. Köln: DuMont-Schauberg, 1928.
MLA (9th ed.) CitationPohl, Heinrich, et al. Bürgerkunde. 31. - 40. Tsd. DuMont-Schauberg, 1928.
Warning: These citations may not always be 100% accurate.