Michels, R. (1962). Political parties: A sociological study of the oligarchical tendencies of modern democracy. The Free Press.
Citazione stile Chigago Style (17a edizione)Michels, Robert. Political Parties: A Sociological Study of the Oligarchical Tendencies of Modern Democracy. Nueva York: The Free Press, 1962.
Citatione MLA (9a ed.)Michels, Robert. Political Parties: A Sociological Study of the Oligarchical Tendencies of Modern Democracy. The Free Press, 1962.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.