Citazione APA

Gear, J., & Gear, R. (2006). Cambride perparation for the TOEFL test (4th ed.). Cambridge University press.

Stile di citazione Chicago

Gear, Jolene, e Robert Gear. Cambride Perparation for the TOEFL Test. 4th ed. Cambride: Cambridge University press, 2006.

Citazione MLA

Gear, Jolene, e Robert Gear. Cambride Perparation for the TOEFL Test. 4th ed. Cambridge University press, 2006.