APA aipamena

PERKINS, D. (1955). The American Approach to Foreign Policy. Harvard University Press.

Chicago Style aipamena

PERKINS, Dexter. The American Approach to Foreign Policy. Harvard University Press, 1955.

MLA aipamena

PERKINS, Dexter. The American Approach to Foreign Policy. Harvard University Press, 1955.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.