APA

(2011). Cambridge BEC Vantage: Practice Tests (2 CDs). : .

Chicago

2011. Cambridge BEC Vantage: Practice Tests (2 CDs). : .

Harvard

(2011). Cambridge BEC Vantage: Practice Tests (2 CDs). : .

MLA

Cambridge BEC Vantage: Practice Tests (2 CDs). : . 2011.