Gaya APA

Jakeman, V., McDowell, C. (2007). Cambridge practice tests for IELTS 1 (cet. ke-16). New York: Cambridge University Press.

Gaya MLA

Jakeman, Vanessa., McDowell, Clare. "Cambridge practice tests for IELTS 1". cet. ke-16 New York: Cambridge University Press, 2007. Text.