1. * Peterson's TOEFL 3 copies
2. *Barron 2 copies
3. Arco TOEFL / CD-ROM
4. Kaplan : Eng. and Thai Versions
5. Cambridge Prep. For TOEFL
6. The Princeton Review
7. The penguins Practice
8. The Heinemann TOEFL Test
9. * Chartbook : Understanding and Using English Grammar
10. * Advanced English Grammar อ.สำราญ คำยิ่ง
11. * ETS the Official Guide