Gaya APA

Sullivan, P, N., Zhong, G, Y. (1988). Toefl skills for top scores : Patricia Noble Sulllivan, Grace Yi Qiu Zhong . New York: Prentice Hall Press.

Gaya MLA

Sullivan, Patricia, N., Zhong, Grace, YQ.. "Toefl skills for top scores : Patricia Noble Sulllivan, Grace Yi Qiu Zhong". New York: Prentice Hall Press, 1988. Buku.