Cita APA (7a ed.)

Black, M., & Sharp, W. (2006). Objective IELTS Intermediate: Teacher's book. Cambridge University Press.

Cita Chicago Style (17a ed.)

Black, Michael, y Wendy Sharp. Objective IELTS Intermediate: Teacher's Book. Cambridge, United Kingdom: Cambridge University Press, 2006.

Cita MLA (9a ed.)

Black, Michael, y Wendy Sharp. Objective IELTS Intermediate: Teacher's Book. Cambridge University Press, 2006.