APA (7th ed.) Citation

Educational Testing Service. (2012). The official guide to the TOEFL® test (4th ed.). McGraw-Hill.

Chicago Style (17th ed.) Citation

Educational Testing Service. The Official Guide to the TOEFL® Test. 4th ed. New York [etc.]: McGraw-Hill, 2012.

MLA (9th ed.) Citation

Educational Testing Service. The Official Guide to the TOEFL® Test. 4th ed. McGraw-Hill, 2012.