Cita APA (7a ed.)

Hill, C. (2016). Foreign policy in the twenty-first century (2nd ed.). Palgrave Macmillan.

Cita Chicago Style (17a ed.)

Hill, Christopher. Foreign Policy in the Twenty-first Century. 2nd ed. London ; New York: Palgrave Macmillan, 2016.

Cita MLA (8a ed.)

Hill, Christopher. Foreign Policy in the Twenty-first Century. 2nd ed. Palgrave Macmillan, 2016.