APA (7th ed.) Citation

Simmel, G. (1977). The problems of the Philosophy of History: An epistemological essay. The Free Press.

Chicago Style (17th ed.) Citation

Simmel, Georg. The Problems of the Philosophy of History: An Epistemological Essay. The Free Press, 1977.

MLA (9th ed.) Citation

Simmel, Georg. The Problems of the Philosophy of History: An Epistemological Essay. The Free Press, 1977.

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