APA citiranje

Adrian Doff, & Adrian Doff; Ben Goldstein. (2011). English unlimited. C1, Advanced Coursebook with e-Portfolio. Cambridge: Cambridge University Press.

Trích dẫn kiểu Chicago

Adrian Doff, và Adrian Doff; Ben Goldstein. English Unlimited. C1, Advanced Coursebook With E-Portfolio. Cambridge: Cambridge University Press, 2011.

MLA citiranje

Adrian Doff, và Adrian Doff; Ben Goldstein. English Unlimited. C1, Advanced Coursebook With E-Portfolio. Cambridge: Cambridge University Press, 2011.