SHEELER, W. D. (1991). WELCOME TO ENGLISH BOOK 6. OXPORD UNIVERSITY PRESS.
Lua i Stíl Chicago (17ú heag.)SHEELER, WILLARD D. WELCOME TO ENGLISH BOOK 6. OXPORD UNIVERSITY PRESS, 1991.
Lua MLA (8ú heag.)SHEELER, WILLARD D. WELCOME TO ENGLISH BOOK 6. OXPORD UNIVERSITY PRESS, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.