APA Style

Hopkins, Diana, Cullen, Pauline. (2008). Grammar for IELTS Audio CD . USA: Cambridge University Press.

Chicago Style

Hopkins, Diana, Cullen, Pauline. Grammar for IELTS Audio CD. USA: Cambridge University Press, 2008. Audio CD.

MLA Style

Hopkins, Diana, Cullen, Pauline. Grammar for IELTS Audio CD. USA: Cambridge University Press, 2008. Audio CD.

Turabian Style

Hopkins, Diana, Cullen, Pauline. Grammar for IELTS Audio CD. USA: Cambridge University Press, 2008. Audio CD.