David Rayner. (2000). Extended Mathematics for Cambridge IGCSE. Oxford.
Lua i Stíl Chicago (17ú heag.)David Rayner. Extended Mathematics for Cambridge IGCSE. New York: Oxford, 2000.
Lua MLA (9ú heag.)David Rayner. Extended Mathematics for Cambridge IGCSE. Oxford, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.