APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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