APA (7th ed.) Citation

Calhoun, C. J., Price, P., & Timmer, A. S. (2002). Understanding September 11. New Press.

Chicago Style (17th ed.) Citation

Calhoun, Craig J., Paul Price, and Ashley S. Timmer. Understanding September 11. New York: New Press, 2002.

MLA (9th ed.) Citation

Calhoun, Craig J., et al. Understanding September 11. New Press, 2002.