APA (7th ed.) Citation

Oppenheimer, F. (1922). System der Soziologie. Fischer.

Chicago Style (17th ed.) Citation

Oppenheimer, Franz. System Der Soziologie. Jena: Fischer, 1922.

MLA (8th ed.) Citation

Oppenheimer, Franz. System Der Soziologie. Fischer, 1922.

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