Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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