APA ציטוט

Hopkins, D., & Cullen, P. (2007). Cambridge Grammar for IELTS. New York: Cambridge University Press.

Trích dẫn kiểu Chicago

Hopkins, Diana, và Pauline Cullen. Cambridge Grammar for IELTS. New York: Cambridge University Press, 2007.

ציטוט MLA

Hopkins, Diana, và Pauline Cullen. Cambridge Grammar for IELTS. New York: Cambridge University Press, 2007.