Yule, G. (1985). The study of language: An introduction.
Lua i Stíl Chicago (17ú heag.)Yule, George. The Study of Language: An Introduction. Cambridge Cambridgeshire, 1985.
Lua MLA (9ú heag.)Yule, George. The Study of Language: An Introduction. 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.