Citazione Stile APA (7a Edizione)

(2009). The official guide to the TOEFL test (3rd ed.). McGraw-Hill.

Citazione stile Chigago Style (17a edizione)

The Official Guide to the TOEFL Test. 3rd ed. New York: McGraw-Hill, 2009.

Citatione MLA (9a ed.)

The Official Guide to the TOEFL Test. 3rd ed. McGraw-Hill, 2009.