(2006). Cambridge exams extra PET with answers. Cambridge, UK: Cambidge University Press.
Chicago Style citaatCambridge Exams Extra PET With Answers. Cambridge, UK: Cambidge University Press, 2006.
MLA citatieCambridge Exams Extra PET With Answers. Cambridge, UK: Cambidge University Press, 2006.
Let op: Deze citaties zijn niet altijd 100% accuraat.