De Grazia, A. (1962). The elements of political science (2a. ed.). Free.
Cita Chicago (17th ed.)De Grazia, Alfred. The Elements of Political Science. 2a. ed. Nueva York: Free, 1962.
Cita MLA (9th ed.)De Grazia, Alfred. The Elements of Political Science. 2a. ed. Free, 1962.
Atenció: Aquestes cites poden no estar 100% correctes.