APA

O'Connell S., . (2001). Focus on First Certificate. Harlow: Longman.

Chicago

O'Connell S, . 2001. Focus on First Certificate. Harlow: Longman.

Harvard

O'Connell S., . (2001). Focus on First Certificate. Harlow: Longman.

MLA

O'Connell S, . Focus on First Certificate. Harlow: Longman. 2001.