Cullen, P. (2014). The official Cambridge guide to IELTS for academic & general training: Student's book with answers. Cambridge: Cambridge University Press.
Citação norma ChicagoCullen, Pauline. The Official Cambridge Guide to IELTS for Academic & General Training: Student's Book With Answers. Cambridge: Cambridge University Press, 2014.
Citação norma MLACullen, 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.