Citação norma APA

Cullen, P. (2014). The official Cambridge guide to IELTS for academic &​ general training: Student's book with answers. Cambridge: Cambridge University Press.

Citação norma Chicago

Cullen, Pauline. The Official Cambridge Guide to IELTS for Academic &​ General Training: Student's Book With Answers. Cambridge: Cambridge University Press, 2014.

Citação norma MLA

Cullen, Pauline. The Official Cambridge Guide to IELTS for Academic &​ General Training: Student's Book With Answers. Cambridge: Cambridge University Press, 2014.

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.