Lougheed, L. Barron's ielts: International language testing system.
Lua i Stíl Chicago (17ú heag.)Lougheed, Lin. Barron's Ielts: International Language Testing System. New Delhi New Age International 2007:.
Lua MLA (9ú heag.)Lougheed, Lin. Barron's Ielts: International Language Testing System.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.