Cita APA (7a ed.)

Schweller, R. L. (2008). Unanswered threats: Political constraints on the balance of power (2nd printing and 1st pbk printing.). Princeton University Press.

Cita Chicago Style (17a ed.)

Schweller, Randall L. Unanswered Threats: Political Constraints on the Balance of Power. 2nd printing and 1st pbk printing. Princeton [etc.]: Princeton University Press, 2008.

Cita MLA (9a ed.)

Schweller, Randall L. Unanswered Threats: Political Constraints on the Balance of Power. 2nd printing and 1st pbk printing. Princeton University Press, 2008.