Dallas, D., & Iggulden, . M. (1990). Let's learn English. Longman.
Lua i Stíl Chicago (17ú heag.)Dallas, Donald, agus Margaret Iggulden. Let's Learn English. Harlow: Longman, 1990.
Lua MLA (8ú heag.)Dallas, Donald, agus Margaret Iggulden. Let's Learn English. Longman, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.