Groeg, O. 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. Who's Who-Book.
Chicago-Zitierstil (17. Ausg.)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. Wörthsee b. München: Who's Who-Book.
MLA-Zitierstil (9. Ausg.)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. Who's Who-Book.