APA Citatie

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

Chicago Style citaat

Sullivan, Patricia Noble, en Grace Yi Qiu Zhong. TOEFL Skills for Top Scores. New York: ARCO, 1989.

MLA citatie

Sullivan, Patricia Noble, en Grace Yi Qiu Zhong. TOEFL Skills for Top Scores. ARCO, 1989.