APA (7th ed.) Citation

Doff, A., Stirling, J., & Ackroyd, S. (2011). English Unlimited: C1 Advanced Teacher"s Pack. Cambrigde University Press.

Chicago Style (17th ed.) Citation

Doff, Adrian, Johanna Stirling, and Sarah Ackroyd. English Unlimited: C1 Advanced Teacher"s Pack. Cambrigde: Cambrigde University Press, 2011.

MLA (9th ed.) Citation

Doff, Adrian, et al. English Unlimited: C1 Advanced Teacher"s Pack. Cambrigde University Press, 2011.