Cita APA

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

Citación estilo Chicago

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

Cita MLA

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