Cita APA

Black, M., & Capel, A. (2006). Objective IELTS advanced: Worbook and answers. New York: Cambridge University Press.

Citación estilo Chicago

Black, Michael, and Annette Capel. Objective IELTS Advanced: Worbook and Answers. New York: Cambridge University Press, 2006.

Cita MLA

Black, Michael, and Annette Capel. Objective IELTS Advanced: Worbook and Answers. New York: Cambridge University Press, 2006.