APA (7th ed.) Citation

O'Brien, T. (2006). If i die in a combat zone. Harper Perennial.

Chicago Style (17th ed.) Citation

O'Brien, Tim. If I Die in a Combat Zone. London: Harper Perennial, 2006.

MLA (9th ed.) Citation

O'Brien, Tim. If I Die in a Combat Zone. Harper Perennial, 2006.