Kollmar, E. (1992). Herausforderung Anthroposophie. Brockhaus.
Chicago Style (17th ed.) CitationKollmar, Edgar. Herausforderung Anthroposophie. Wuppertal [u.a.]: Brockhaus, 1992.
MLA (8th ed.) CitationKollmar, Edgar. Herausforderung Anthroposophie. Brockhaus, 1992.
Warning: These citations may not always be 100% accurate.