Combs, J. A. (1986). The history of American foreign policy. Knopf.
Lua i Stíl Chicago (17ú heag.)Combs, Jerald A. The History of American Foreign Policy. New York: Knopf, 1986.
Lua MLA (8ú heag.)Combs, Jerald A. The History of American Foreign Policy. Knopf, 1986.
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