Adrian Doff, & Adrian Doff; Johanna Stirling; Sarah Ackroyd. (2011). English unlimited. C1, Advanced teachers pack. Cambridge: Cambridge University Press.
Παραπομπή Chicago StyleAdrian Doff, και Adrian Doff; Johanna Stirling; Sarah Ackroyd. English Unlimited. C1, Advanced Teachers Pack. Cambridge: Cambridge University Press, 2011.
Παραπομπή MLAAdrian Doff, και Adrian Doff; Johanna Stirling; Sarah Ackroyd. English Unlimited. C1, Advanced Teachers Pack. Cambridge: Cambridge University Press, 2011.
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