APA Style
Allen, M. et al
(2007).
IELTS graduation: class CDs 1 (unit 1-7)
.
[s.l.]:
Macmillan..
MLA Style
Allen, Mark. et al.
"IELTS graduation: class CDs 1 (unit 1-7)".
[s.l.]:
Macmillan.,
2007.
Audio CD.