Cita APA (7a ed.)

Capel, A., & Sharp, W. (2014). Objective first: Student's book without answers (4a ed.). Cambridge University Press.

Cita Chicago Style (17a ed.)

Capel, Annette, y Wendy Sharp. Objective First: Student's Book Without Answers. 4a ed. Cambridge, United Kingdom: Cambridge University Press, 2014.

Cita MLA (9a ed.)

Capel, Annette, y Wendy Sharp. Objective First: Student's Book Without Answers. 4a ed. Cambridge University Press, 2014.