Harrigan, J. J. (1992). Politics and the American future (3rd ed.). McGraw-Hill.
Cita Chicago (17th ed.)Harrigan, John J. Politics and the American Future. 3rd ed. New York: McGraw-Hill, 1992.
Cita MLA (9th ed.)Harrigan, John J. Politics and the American Future. 3rd ed. McGraw-Hill, 1992.
Atenció: Aquestes cites poden no estar 100% correctes.