Butler, N. (1874). A practical and critical grammar of the English language. John P. Morton and Company.
Lua i Stíl Chicago (17ú heag.)Butler, Noble. A Practical and Critical Grammar of the English Language. Louisville: John P. Morton and Company, 1874.
Lua MLA (8ú heag.)Butler, Noble. A Practical and Critical Grammar of the English Language. John P. Morton and Company, 1874.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.