APA (7th ed.) Citation

Capel, A., & Sharp, W. (2013). Objective proficiency: Teacher's book (2a. ed.). Cambridge University Press.

Chicago Style (17th ed.) Citation

Capel, Annette, and Wendy Sharp. Objective Proficiency: Teacher's Book. 2a. ed. Cambridge: Cambridge University Press, 2013.

MLA (9th ed.) Citation

Capel, Annette, and Wendy Sharp. Objective Proficiency: Teacher's Book. 2a. ed. Cambridge University Press, 2013.