APA

O'Connell S., Foley M. & Whitehead R. (2005). Focus on Advanced English C.A. E. Harlow: Longman.

Chicago

O'Connell S, Foley M and Whitehead R. 2005. Focus on Advanced English C.A. E. Harlow: Longman.

Harvard

O'Connell S., Foley M. and Whitehead R. (2005). Focus on Advanced English C.A. E. Harlow: Longman.

MLA

O'Connell S, Foley M and Whitehead R. Focus on Advanced English C.A. E. Harlow: Longman. 2005.