APA

Acklam R., Burgess S., . (2001). First certificate Gold. : Longman.

Chicago

Acklam R, Burgess S, . 2001. First certificate Gold. : Longman.

Harvard

Acklam R., Burgess S., . (2001). First certificate Gold. : Longman.

MLA

Acklam R, Burgess S, . First certificate Gold. : Longman. 2001.