Cita APA (7a ed.)

Black, M., & Capel, A. (2006). Objective IELTS: Advanced. Cambridge University Press.

Cita Chicago Style (17a ed.)

Black, Michael, y Annette Capel. Objective IELTS: Advanced. Cambridge ; New York: Cambridge University Press, 2006.

Cita MLA (9a ed.)

Black, Michael, y Annette Capel. Objective IELTS: Advanced. Cambridge University Press, 2006.