APA Style

Doff, A., Thaine, C. (2016). Cambridge English Empower Advan Student's Book w/OL Assessment & OL WB . Cambridge: Cambridge University Press.

MLA Style

Doff, Adrian., Thaine, Craig. "Cambridge English Empower Advan Student's Book w/OL Assessment & OL WB". Cambridge: Cambridge University Press, 2016. Bahasa Inggris.