Ball, W. (1974). A practical guide to colloquial idiom. Longman group.
Lua i Stíl Chicago (17ú heag.)Ball, W. A Practical Guide to Colloquial Idiom. London: Longman group, 1974.
Lua MLA (9ú heag.)Ball, W. A Practical Guide to Colloquial Idiom. Longman group, 1974.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.