APA (7th ed.) Citation

Gaupp, O. (1923). Herbert Spencer (5. Aufl.). Frommann.

Chicago Style (17th ed.) Citation

Gaupp, Otto. Herbert Spencer. 5. Aufl. Stuttgart: Frommann, 1923.

MLA (9th ed.) Citation

Gaupp, Otto. Herbert Spencer. 5. Aufl. Frommann, 1923.

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