APA (7th ed.) Citation

Gaupp, O. (1906). Herbert Spencer (3., verm. Aufl.). Frommann.

Chicago Style (17th ed.) Citation

Gaupp, Otto. Herbert Spencer. 3., verm. Aufl. Stuttgart: Frommann, 1906.

MLA (9th ed.) Citation

Gaupp, Otto. Herbert Spencer. 3., verm. Aufl. Frommann, 1906.

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