Cita APA (7th ed.)

Gear, J., & Gear, R. (2006). Cambridge preparation for the TOEFL test (4a. ed.). Cambridge University Press.

Cita Chicago (17th ed.)

Gear, Jolene, i Robert Gear. Cambridge Preparation for the TOEFL Test. 4a. ed. Cambridge: Cambridge University Press, 2006.

Cita MLA (9th ed.)

Gear, Jolene, i Robert Gear. Cambridge Preparation for the TOEFL Test. 4a. ed. Cambridge University Press, 2006.