APA

Bell J., Gower R., . (2001). Matters. Upper Intermediate. : Longman.

Chicago

Bell J, Gower R, . 2001. Matters. Upper Intermediate. : Longman.

Harvard

Bell J., Gower R., . (2001). Matters. Upper Intermediate. : Longman.

MLA

Bell J, Gower R, . Matters. Upper Intermediate. : Longman. 2001.