APA

Whitehead R., Black M., . (2004). Pass Cambridge BEC Vantage. Oxford: Summertown Publishing.

Chicago

Whitehead R, Black M, . 2004. Pass Cambridge BEC Vantage. Oxford: Summertown Publishing.

Harvard

Whitehead R., Black M., . (2004). Pass Cambridge BEC Vantage. Oxford: Summertown Publishing.

MLA

Whitehead R, Black M, . Pass Cambridge BEC Vantage. Oxford: Summertown Publishing. 2004.