Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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