Wallwork, A. (2007). International express: Workbook : Upper-Intermediate. New York: Oxford University Press.
Stile di citazione ChicagoWallwork, Adrian. International Express: Workbook : Upper-Intermediate. New York: Oxford University Press, 2007.
Citazione MLAWallwork, Adrian. International Express: Workbook : Upper-Intermediate. New York: Oxford University Press, 2007.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.