Littlejohn, A. (1998). Cambridge english for schools: Workbook. Cambridge, UK: Cambridge University Press.
Trích dẫn kiểu ChicagoLittlejohn, Andrew. Cambridge English for Schools: Workbook. Cambridge, UK: Cambridge University Press, 1998.
MLA引文Littlejohn, Andrew. Cambridge English for Schools: Workbook. Cambridge, UK: Cambridge University Press, 1998.
警告：这些引文格式不一定是100％准确.