APA (7th ed.) Citation
Doff, A., Stirling, J., & Ackroyd, S. (2011). English unlimited: C1 advanced teacher's pack. Cambridge University press.
Chicago Style (17th ed.) Citation
Doff, Adrian, Johanna Stirling, and Sarah Ackroyd. English Unlimited: C1 Advanced Teacher's Pack. Cambridge: Cambridge University press, 2011.
MLA (9th ed.) Citation
Doff, Adrian, et al. English Unlimited: C1 Advanced Teacher's Pack. Cambridge University press, 2011.
Warning: These citations may not always be 100% accurate.