APA

Jakeman V., McDowell C., . (2006). Step up to IELTS. Edinburgh: Cambridge University Press.

Chicago

Jakeman V, McDowell C, . 2006. Step up to IELTS. Edinburgh: Cambridge University Press.

Harvard

Jakeman V., McDowell C., . (2006). Step up to IELTS. Edinburgh: Cambridge University Press.

MLA

Jakeman V, McDowell C, . Step up to IELTS. Edinburgh: Cambridge University Press. 2006.