APA (7th ed.) Citation

Oppenheimer, F., & Spindler-Gysin, B. (1964). System der Soziologie System der Soziologie.

Chicago Style (17th ed.) Citation

Oppenheimer, Franz, and Bertha Spindler-Gysin. "System Der Soziologie." System Der Soziologie 1964.

MLA (8th ed.) Citation

Oppenheimer, Franz, and Bertha Spindler-Gysin. "System Der Soziologie." System Der Soziologie, 1964.

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