APA

Acklam R., Crace A., . (2008). Premium. B2 level. Harlow: Longman.

Chicago

Acklam R, Crace A, . 2008. Premium. B2 level. Harlow: Longman.

Harvard

Acklam R., Crace A., . (2008). Premium. B2 level. Harlow: Longman.

MLA

Acklam R, Crace A, . Premium. B2 level. Harlow: Longman. 2008.