Cita APA

Black, M., & Boyd, E. (2006). Objective IELTS advanced [CD-ROM]: Self-study student's book. New York: Cambridge University Press.

Citación estilo Chicago

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

Cita MLA

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