APA
(2009). Theories of International Relations. New York: Palgrave Macmillan.
Chicago
2009. Theories of International Relations. New York: Palgrave Macmillan.
Harvard
(2009). Theories of International Relations. New York: Palgrave Macmillan.
MLA
Theories of International Relations. New York: Palgrave Macmillan. 2009.