APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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

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