APA (7th ed.) Citation

Sullivan, P. ., & Zhong, G. Y. Q. (1989). TOEFL skills for top scores. Prentice Hall.

Chicago Style (17th ed.) Citation

Sullivan, Patricia , and Grace Yi Qiu Zhong. TOEFL Skills for Top Scores. New York: Prentice Hall, 1989.

MLA (9th ed.) Citation

Sullivan, Patricia , and Grace Yi Qiu Zhong. TOEFL Skills for Top Scores. Prentice Hall, 1989.