APA

Acklam R., Burgess S., . (1997). First Certificate Gold. Harlow: Longman.

Chicago

Acklam R, Burgess S, . 1997. First Certificate Gold. Harlow: Longman.

Harvard

Acklam R., Burgess S., . (1997). First Certificate Gold. Harlow: Longman.

MLA

Acklam R, Burgess S, . First Certificate Gold. Harlow: Longman. 1997.