Michels , R. (1966). Political parties: A social-ogical study of the oligarchic al tendencies of modern democracy. Free Press.
Citazione stile Chigago Style (17a edizione)Michels , Robert. Political Parties: A Social-ogical Study of the Oligarchic Al Tendencies of Modern Democracy. New York: Free Press, 1966.
Citatione MLA (9a ed.)Michels , Robert. Political Parties: A Social-ogical Study of the Oligarchic Al Tendencies of Modern Democracy. Free Press, 1966.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.