APA (7th ed.) Citation

Simmel, G. (1989). Hauptprobleme der Philosophie. Walter de Gruyter.

Chicago Style (17th ed.) Citation

Simmel, Georg. Hauptprobleme Der Philosophie. Berlin: Walter de Gruyter, 1989.

MLA (8th ed.) Citation

Simmel, Georg. Hauptprobleme Der Philosophie. Walter de Gruyter, 1989.

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