APA (7th ed.) Citation

Educational Testing Service. The official guide to the TOEFL test. / (Cuarta edición.). McGraw Hill.

Chicago Style (17th ed.) Citation

Educational Testing Service. The Official Guide to the TOEFL Test. /. Cuarta edición. New York: McGraw Hill.

MLA (9th ed.) Citation

Educational Testing Service. The Official Guide to the TOEFL Test. /. Cuarta edición. McGraw Hill.

Warning: These citations may not always be 100% accurate.