APA (7th ed.) Citation

The_official... (2007). The official guide to the new toefl. McGraw Hill.

Chicago Style (17th ed.) Citation

The_official... The Official Guide to the New Toefl. McGraw Hill, 2007.

MLA (8th ed.) Citation

The_official... The Official Guide to the New Toefl. McGraw Hill, 2007.

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