Wolff, K. H. (1969). The sociology of Georg Simmel (4th ed.). The Free Press.
Cita Chicago Style (17a ed.)Wolff, Kurt H. The Sociology of Georg Simmel. 4th ed. New York: The Free Press, 1969.
Cita MLA (8a ed.)Wolff, Kurt H. The Sociology of Georg Simmel. 4th ed. The Free Press, 1969.
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