Emma Danihel; Izabella Hearn. (2015). Oxford English for Cambridge Primary Workbook 4 (CIE IGCSE Complete Series) (Workbook.). Oxford University Press.
Chicago-referens (17:e uppl.)Emma Danihel; Izabella Hearn. Oxford English for Cambridge Primary Workbook 4 (CIE IGCSE Complete Series). Workbook. Oxford University Press, 2015.
MLA-referens (9:e uppl.)Emma Danihel; Izabella Hearn. Oxford English for Cambridge Primary Workbook 4 (CIE IGCSE Complete Series). Workbook. Oxford University Press, 2015.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.