APA

Williams A., Pile L., . (1999). Pass Cambridge. BEC 2. Oxford: Summertown Publishing.

Chicago

Williams A, Pile L, . 1999. Pass Cambridge. BEC 2. Oxford: Summertown Publishing.

Harvard

Williams A., Pile L., . (1999). Pass Cambridge. BEC 2. Oxford: Summertown Publishing.

MLA

Williams A, Pile L, . Pass Cambridge. BEC 2. Oxford: Summertown Publishing. 1999.