APA (7th ed.) Zitazioa

Michels, R. (1962). Political parties: A sociological study of the oligarchical tendencies of modern democracy. The Free Press.

Chicago Style (17th ed.) Zitazioa

Michels, Robert. Political Parties: A Sociological Study of the Oligarchical Tendencies of Modern Democracy. Nueva York: The Free Press, 1962.

MLA (9th ed.) Zitazioa

Michels, Robert. Political Parties: A Sociological Study of the Oligarchical Tendencies of Modern Democracy. The Free Press, 1962.