Pennock, J. R., & Smith, D. G. (1964). Political science: An introduction. Macmillan.
Cita Chicago (17th ed.)Pennock, James Roland, i David G. Smith. Political Science: An Introduction. New York: Macmillan, 1964.
Cita MLA (9th ed.)Pennock, James Roland, i David G. Smith. Political Science: An Introduction. Macmillan, 1964.
Atenció: Aquestes cites poden no estar 100% correctes.