APA (7th ed.) Citation

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 (7. ed.). Who's Who-Book.

Chicago Style (17th ed.) Citation

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. 7. ed. Wörthsee b. München: Who's Who-Book, 1980.

MLA (9th ed.) Citation

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. 7. ed. Who's Who-Book, 1980.