APA (7th ed.) Citation

Hefele, H. (1918). Zur Psychologie der Etappe (1. - 3. Tsd.). Diederichs.

Chicago Style (17th ed.) Citation

Hefele, Herman. Zur Psychologie Der Etappe. 1. - 3. Tsd. Jena: Diederichs, 1918.

MLA (9th ed.) Citation

Hefele, Herman. Zur Psychologie Der Etappe. 1. - 3. Tsd. Diederichs, 1918.

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