Cita APA (7a ed.)

Gear, J., & Gear, R. (2007). Cambridge preparation for the TOEFL test (4th ed.). Cambridge University Press.

Cita Chicago Style (17a ed.)

Gear, Jolene, y Robert Gear. Cambridge Preparation for the TOEFL Test. 4th ed. Cambridge ; New York ; New Delhi: Cambridge University Press, 2007.

Cita MLA (8a ed.)

Gear, Jolene, y Robert Gear. Cambridge Preparation for the TOEFL Test. 4th ed. Cambridge University Press, 2007.