Dyfyniad APA
Harrigan, J. J. (1992). Politics and the American future (3rd ed.). McGraw-Hill.
Dyfyniad Arddull Chicago
Harrigan, John J. Politics and the American Future. 3rd ed. New York: McGraw-Hill, 1992.
Dyfyniad MLA
Harrigan, John J. Politics and the American Future. 3rd ed. McGraw-Hill, 1992.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.