APA (7th ed.) Citation

Capel, A., Sharp, W., Sunderland, P., & Whetterm, E. (2013). Objective proficiency (Second edition.). Cambridge University Press.

Chicago Style (17th ed.) Citation

Capel, Annette, Wendy Sharp, Peter Sunderland, and Erica Whetterm. Objective Proficiency. Second edition. Cambridge: Cambridge University Press, 2013.

MLA (9th ed.) Citation

Capel, Annette, et al. Objective Proficiency. Second edition. Cambridge University Press, 2013.