APA

Williams A., Pile L., . (2006). Pass Cambridge BEC Vantage. B2. Oxford: Summertown Publishing.

Chicago

Williams A, Pile L, . 2006. Pass Cambridge BEC Vantage. B2. Oxford: Summertown Publishing.

Harvard

Williams A., Pile L., . (2006). Pass Cambridge BEC Vantage. B2. Oxford: Summertown Publishing.

MLA

Williams A, Pile L, . Pass Cambridge BEC Vantage. B2. Oxford: Summertown Publishing. 2006.