Hughes J. John. (2006). Telephone English: Includes phrase bank, audio CD and role plays. Oxford, Macmillan, 2006.
Citazione stile Chigago Style (17a edizione)Hughes J. John. Telephone English: Includes Phrase Bank, Audio CD and Role Plays. Oxford, Macmillan, 2006, 2006.
Citatione MLA (9a ed.)Hughes J. John. Telephone English: Includes Phrase Bank, Audio CD and Role Plays. Oxford, Macmillan, 2006, 2006.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.