Cita APA (7a ed.)

Black, M. (2006). Objective IELTS Intermediate: Self-study student's book. Cambridge University Press.

Cita Chicago Style (17a ed.)

Black, Michael. Objective IELTS Intermediate: Self-study Student's Book. New York: Cambridge University Press, 2006.

Cita MLA (9a ed.)

Black, Michael. Objective IELTS Intermediate: Self-study Student's Book. Cambridge University Press, 2006.