APA (7th ed.) Citation

Gramatzki, H., Gramatzki, H. E., & Gramatzki, H. .

Chicago Style (17th ed.) Citation

Gramatzki, Hans-Erich, Hans Erich Gramatzki, and Hans-E Gramatzki. .

MLA (9th ed.) Citation

Gramatzki, Hans-Erich, et al. .