Cita APA (7a ed.)

Bergen, P. L. (2011). The longest war: The enduring conflict between America and al-Qaeda (1st free trade pbk ed.). Free Press.

Cita Chicago Style (17a ed.)

Bergen, Peter L. The Longest War: The Enduring Conflict Between America and Al-Qaeda. 1st free trade pbk ed. New York [etc.]: Free Press, 2011.

Cita MLA (9a ed.)

Bergen, Peter L. The Longest War: The Enduring Conflict Between America and Al-Qaeda. 1st free trade pbk ed. Free Press, 2011.