Radley, P. (2005). Horizons: Workbook 2. Oxford: Oxford University Press.
Trích dẫn kiểu ChicagoRadley, Paul. Horizons: Workbook 2. Oxford: Oxford University Press, 2005.
MLA引文Radley, Paul. Horizons: Workbook 2. Oxford: Oxford University Press, 2005.
警告：这些引文格式不一定是100％准确.