Hugues, J. (2008). Language leader: Workbook with key and audio cd : intermediate. Pearson Education Limited.
Citazione stile Chigago Style (17a edizione)Hugues, John. Language Leader: Workbook with Key and Audio Cd : Intermediate. Harlow: Pearson Education Limited, 2008.
Citatione MLA (8a ed.)Hugues, John. Language Leader: Workbook with Key and Audio Cd : Intermediate. Pearson Education Limited, 2008.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.