APA aipamena

Adrian Doff, & Adrian Doff; Johanna Stirling; Sarah Ackroyd. (2011). English unlimited. C1, Advanced teachers pack. Cambridge: Cambridge University Press.

Chicago Style aipamena

Adrian Doff, và Adrian Doff; Johanna Stirling; Sarah Ackroyd. English Unlimited. C1, Advanced Teachers Pack. Cambridge: Cambridge University Press, 2011.

MLA aipamena

Adrian Doff, và Adrian Doff; Johanna Stirling; Sarah Ackroyd. English Unlimited. C1, Advanced Teachers Pack. Cambridge: Cambridge University Press, 2011.