APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

Sullivan, Patricia N., and Grace Yi Qiu Zhong. TOEFL Skills for Top Scores. Arco, 1989.