APA (7th ed.) Citation

Cullen, French, & Jakeman. (2014). The official Cambridge guide to IELTS for academic & general training. Cambridge University Press.

Chicago Style (17th ed.) Citation

Cullen, French, and Jakeman. The Official Cambridge Guide to IELTS for Academic & General Training. United Kingdom: Cambridge University Press, 2014.

MLA (8th ed.) Citation

Cullen, et al. The Official Cambridge Guide to IELTS for Academic & General Training. Cambridge University Press, 2014.