Gaya APA

Taylore-Knowles, M, M, &, S. (2009). IELTS for academic purpose : 4 practice tests . New York: McGrawhill.

Gaya MLA

Taylore-Knowles, Malcolm, Mann, &, Steve. "IELTS for academic purpose : 4 practice tests". New York: McGrawhill, 2009. Electronic Resource.