Gifford, P., & ed. The National interests of the United States in foreign policy. University Press of America.
Lua i Stíl Chicago (17ú heag.)Gifford, Prosser, agus ed. The National Interests of the United States in Foreign Policy. Washington, D.C.: University Press of America.
Lua MLA (9ú heag.)Gifford, Prosser, agus ed. The National Interests of the United States in Foreign Policy. University Press of America.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.