APA (7th ed.) Citation

Perkins, D. (1954). The American approach to foreign policy (4th printing.). Harvard University Press.

Chicago Style (17th ed.) Citation

Perkins, Dexter. The American Approach to Foreign Policy. 4th printing. Cambridge (Massachusetts): Harvard University Press, 1954.

MLA (9th ed.) Citation

Perkins, Dexter. The American Approach to Foreign Policy. 4th printing. Harvard University Press, 1954.