Cita APA (7th ed.)

Michels , . R. (1968). Political parties: A sociological study of the Oligarchical tendencies of modern democracy (2nd ed.). Free Press.

Cita Chicago (17th ed.)

Michels , Robert. Political Parties: A Sociological Study of the Oligarchical Tendencies of Modern Democracy. 2nd ed. New York: Free Press, 1968.

Cita MLA (9th ed.)

Michels , Robert. Political Parties: A Sociological Study of the Oligarchical Tendencies of Modern Democracy. 2nd ed. Free Press, 1968.