Lua APA (7ú heag.)
Labov, W. (1994). Principles of linguistic change: Volume 1, Internal factors. Cambridge, MA : Blackwell.
Lua i Stíl Chicago (17ú heag.)
Labov, William. Principles of Linguistic Change: Volume 1, Internal Factors. Oxford, Reino Unido: Cambridge, MA : Blackwell, 1994.
Lua MLA (9ú heag.)
Labov, William. Principles of Linguistic Change: Volume 1, Internal Factors. Cambridge, MA : Blackwell, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.