O'Connell S. Sue. (2002). Focus on Advanced English C. A. E.; Revised and Updated: Teacher's Book (5-th ed.). Longman, 2002.
Chicago-referens (17:e uppl.)O'Connell S. Sue. Focus on Advanced English C. A. E.; Revised and Updated: Teacher's Book. 5-th ed. Longman, 2002, 2002.
MLA-referens (9:e uppl.)O'Connell S. Sue. Focus on Advanced English C. A. E.; Revised and Updated: Teacher's Book. 5-th ed. Longman, 2002, 2002.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.