APA aipamena

Harris, O. (1991). America's purpose: New visions of U.S.foreign policy.

Chicago Style aipamena

Harris, Owen. America's Purpose: New Visions of U.S.foreign Policy. 1991.

MLA aipamena

Harris, Owen. America's Purpose: New Visions of U.S.foreign Policy. 1991.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.