Martin J. Jackie & May P. Peter. (2011). Knockout. First Certificate: Workbook with key and tapescripts. Oxford, Oxford University Press, 2011.
Citazione stile Chigago Style (17a edizione)Martin J. Jackie e May P. Peter. Knockout. First Certificate: Workbook with Key and Tapescripts. Oxford, Oxford University Press, 2011, 2011.
Citatione MLA (9a ed.)Martin J. Jackie e May P. Peter. Knockout. First Certificate: Workbook with Key and Tapescripts. Oxford, Oxford University Press, 2011, 2011.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.