Cita APA

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

Chicago Edition Citation

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

Cita MLA

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