APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (8. p.)

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