APA

Wolff K. H., . (1964). The sociology of Georg Simmel. New York: The Free Press.

Chicago

Wolff Kurt H, . 1964. The sociology of Georg Simmel. New York: The Free Press.

Harvard

Wolff K. H., . (1964). The sociology of Georg Simmel. New York: The Free Press.

MLA

Wolff Kurt H, . The sociology of Georg Simmel. New York: The Free Press. 1964.