Geoffrey Leech, J. S. (2002). <A >comunicative grammar of english. Pearson Education.
Lua i Stíl Chicago (17ú heag.)Geoffrey Leech, Jan Svartvik. <A >comunicative Grammar of English. Pearson Education, 2002.
Lua MLA (8ú heag.)Geoffrey Leech, Jan Svartvik. <A >comunicative Grammar of English. Pearson Education, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.