APA (7th ed.) Citation

Tilbury, A., Hendra, L. A., & Ackroyd, S. (2011). English unlimited: Upper intermediate : Teacher's Pack. Cambridge University Press.

Chicago Style (17th ed.) Citation

Tilbury, Alex, Leslie Anne Hendra, and Sarah Ackroyd. English Unlimited: Upper Intermediate : Teacher's Pack. Cambridge, GB: Cambridge University Press, 2011.

MLA (8th ed.) Citation

Tilbury, Alex, et al. English Unlimited: Upper Intermediate : Teacher's Pack. Cambridge University Press, 2011.