APA

Bell J., Gower R., . (2006). First Certificate Expert. Harlow: Longman.

Chicago

Bell J, Gower R, . 2006. First Certificate Expert. Harlow: Longman.

Harvard

Bell J., Gower R., . (2006). First Certificate Expert. Harlow: Longman.

MLA

Bell J, Gower R, . First Certificate Expert. Harlow: Longman. 2006.