Bolton, D., Oxenden, C., & Peterson, L. (1989). Oxford intensive english courses. OK student's book. Oxford: Oxford University Press.
Chicago Style CitationBolton, David, Clive Oxenden, and Len Peterson. Oxford Intensive English Courses. OK Student's Book. Oxford: Oxford University Press, 1989.
MLA CitationBolton, David, Clive Oxenden, and Len Peterson. Oxford Intensive English Courses. OK Student's Book. Oxford: Oxford University Press, 1989.
Warning: These citations may not always be 100% accurate.