Harrison, M. (2012). Complete IELTS: Workbook Audio CD. Cambridge: Cambridge Univeristy.
Trích dẫn kiểu ChicagoHarrison, Mark. Complete IELTS: Workbook Audio CD. Cambridge: Cambridge Univeristy, 2012.
MLA引文Harrison, Mark. Complete IELTS: Workbook Audio CD. Cambridge: Cambridge Univeristy, 2012.
警告：这些引文格式不一定是100％准确.