APA (7th ed.) Citation

Luhmann, N. (1982). The differentiation of society. Columbia University Press.

Chicago Style (17th ed.) Citation

Luhmann, Niklas. The Differentiation of Society. New York: Columbia University Press, 1982.

MLA (9th ed.) Citation

Luhmann, Niklas. The Differentiation of Society. Columbia University Press, 1982.