APA (7th ed.) Citation

Gebhardt, H. (1920). Some biografical notes on the back.

Chicago Style (17th ed.) Citation

Gebhardt, Hans. Some Biografical Notes on the Back. 1920.

MLA (8th ed.) Citation

Gebhardt, Hans. Some Biografical Notes on the Back. 1920.

Warning: These citations may not always be 100% accurate.