APA (7th ed.) Citation

Hellpach, W. (1906). Die geistigen Epidemien.

Chicago Style (17th ed.) Citation

Hellpach, Willy. Die Geistigen Epidemien. 1906.

MLA (8th ed.) Citation

Hellpach, Willy. Die Geistigen Epidemien. 1906.

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