Pierce, D., Coggshall, V., & Kinsell, S. (2010). Cracking the toefl ibt with cd, 2011 edition (2011 edition.). Random House.

Pierce, Douglas, Vanessa Coggshall, and Sean Kinsell. Cracking the Toefl Ibt with Cd, 2011 Edition. 2011 edition. New York: Random House, 2010.

Pierce, Douglas, et al. Cracking the Toefl Ibt with Cd, 2011 Edition. 2011 edition. Random House, 2010.