APA-referens (7:e uppl.)

Collins UK. (2018). Cambridge IGCSE® English Workbook (Cambridge International Examinations) ("Third Edition, Third edition".). HarperCollins UK.

Chicago-referens (17:e uppl.)

Collins UK. Cambridge IGCSE® English Workbook (Cambridge International Examinations). "Third Edition, Third edition". HarperCollins UK, 2018.

MLA-referens (9:e uppl.)

Collins UK. Cambridge IGCSE® English Workbook (Cambridge International Examinations). "Third Edition, Third edition". HarperCollins UK, 2018.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.