APA (7th ed.) Citation

Educational Testing Service. (2013). Official TOEFL iBT tests with audio (International ed.). McGraw-Hill.

Chicago Style (17th ed.) Citation

Educational Testing Service. Official TOEFL IBT Tests with Audio. International ed. New York: McGraw-Hill, 2013.

MLA (9th ed.) Citation

Educational Testing Service. Official TOEFL IBT Tests with Audio. International ed. McGraw-Hill, 2013.

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