Cita APA (7th ed.)
Grazia, A. d. (1949). Roberto Michels' first lectures in political sociology. Harper Torchbooks.
Cita Chicago (17th ed.)
Grazia, Alfred de. Roberto Michels' First Lectures in Political Sociology. New York: Harper Torchbooks, 1949.
Cita MLA (9th ed.)
Grazia, Alfred de. Roberto Michels' First Lectures in Political Sociology. Harper Torchbooks, 1949.
Atenció: Aquestes cites poden no estar 100% correctes.