APA (7th ed.) Citation

Heider, F. The notebooks. Psychologie-Verl.-Union.

Chicago Style (17th ed.) Citation

Heider, Fritz. The Notebooks. München u.a: Psychologie-Verl.-Union.

MLA (9th ed.) Citation

Heider, Fritz. The Notebooks. Psychologie-Verl.-Union.

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