Littlejohn, A. (2000). Cambridge English worldwide: Workbook 5. Cambridge, UK: Cambridge University Press.
Trích dẫn kiểu ChicagoLittlejohn, Andrew. Cambridge English Worldwide: Workbook 5. Cambridge, UK: Cambridge University Press, 2000.
MLA引文Littlejohn, Andrew. Cambridge English Worldwide: Workbook 5. Cambridge, UK: Cambridge University Press, 2000.
警告：这些引文格式不一定是100％准确.