Oxenden, C. (2010). American English file: Workbook starter with answer key. Oxford: Oxford University Press.
Stile di citazione ChicagoOxenden, Clive. American English File: Workbook Starter With Answer Key. Oxford: Oxford University Press, 2010.
Citazione MLAOxenden, Clive. American English File: Workbook Starter With Answer Key. Oxford: Oxford University Press, 2010.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.