Groeg, O. J. (1980). Who's who in Germany: A biographical encyclopedia of the International red series containing biographies of living prominent personalities selected for this edition and listing the most important organizations (7th ed.). Who's who - book publ..
Citácia podle Chicago (17th ed.)Groeg, Otto J. Who's Who in Germany: A Biographical Encyclopedia of the International Red Series Containing Biographies of Living Prominent Personalities Selected for This Edition and Listing the Most Important Organizations. 7th ed. Wörthsee bei München: Who's who - book publ., 1980.
Citácia podľa MLA (8th ed.)Groeg, Otto J. Who's Who in Germany: A Biographical Encyclopedia of the International Red Series Containing Biographies of Living Prominent Personalities Selected for This Edition and Listing the Most Important Organizations. 7th ed. Who's who - book publ., 1980.