APA Style

Chris, B., Libby, M. (2016). Cambridge Global English Workbook 9 for Cambridge Secondary 1 English as a Second Language (1st edition). UK: Cambridge University Press.

MLA Style

Chris, Barker., Libby, Mitchell. "Cambridge Global English Workbook 9 for Cambridge Secondary 1 English as a Second Language". 1st edition UK: Cambridge University Press, 2016. Textbook.