Wood, I. (2001). Pass Cambridge BEC Vantage: Work book with answer key. Summertown Publishing.
Citazione stile Chigago Style (17a edizione)Wood, Ian. Pass Cambridge BEC Vantage: Work Book with Answer Key. Oxford: Summertown Publishing, 2001.
Citatione MLA (8a ed.)Wood, Ian. Pass Cambridge BEC Vantage: Work Book with Answer Key. Summertown Publishing, 2001.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.