APA (7th ed.) Citation

Metcalf, R., Cavey, C., & Greenwood, A. (2011). English Unlimited: B2 Upper Intermediate Self-study pack. Cambridge University Press.

Chicago Style (17th ed.) Citation

Metcalf, Rob, Chris Cavey, and Alison Greenwood. English Unlimited: B2 Upper Intermediate Self-study Pack. Cambridge: Cambridge University Press, 2011.

MLA (9th ed.) Citation

Metcalf, Rob, et al. English Unlimited: B2 Upper Intermediate Self-study Pack. Cambridge University Press, 2011.