APA

Jakeman V., McDowell C., . (2007). Insight into IELTS Extra with Answers. New York: Cambridge University Press.

Chicago

Jakeman V, McDowell C, . 2007. Insight into IELTS Extra with Answers. New York: Cambridge University Press.

Harvard

Jakeman V., McDowell C., . (2007). Insight into IELTS Extra with Answers. New York: Cambridge University Press.

MLA

Jakeman V, McDowell C, . Insight into IELTS Extra with Answers. New York: Cambridge University Press. 2007.