APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Bergen, Peter L. The Longest War: The Enduring Conflict Between America and Al-Qaeda. 1. free press hardcover ed. New York [u.a.]: Free Press, 2011.

MLA (8th ed.) Citation

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