Cita APA (7a ed.)

Black, M., Boyd, E., & Triggs, T. (2006). Objective IELTS Intermediate [CD-ROM]: Self-study student's book. Cambridge University Press.

Cita Chicago Style (17a ed.)

Black, Michael, Elaine Boyd, y Tony Triggs. Objective IELTS Intermediate [CD-ROM]: Self-study Student's Book. New York: Cambridge University Press, 2006.

Cita MLA (9a ed.)

Black, Michael, et al. Objective IELTS Intermediate [CD-ROM]: Self-study Student's Book. Cambridge University Press, 2006.