APA

O'Connell S., . (2003). Focus on IELTS. Harlow: Longman.

Chicago

O'Connell S, . 2003. Focus on IELTS. Harlow: Longman.

Harvard

O'Connell S., . (2003). Focus on IELTS. Harlow: Longman.

MLA

O'Connell S, . Focus on IELTS. Harlow: Longman. 2003.