Emma Danihel; Izabella Hearn. (2015). Oxford English for Cambridge Primary Workbook 4 (CIE IGCSE Complete Series) (Workbook.). Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Emma Danihel; Izabella Hearn. Oxford English for Cambridge Primary Workbook 4 (CIE IGCSE Complete Series). Workbook. Oxford University Press, 2015.
Lua MLA (9ú heag.)Emma Danihel; Izabella Hearn. Oxford English for Cambridge Primary Workbook 4 (CIE IGCSE Complete Series). Workbook. Oxford University Press, 2015.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.