Cita APA (7th ed.)
Labov, W. (1994). Principles of linguistic change: Volume 1, Internal factors. Cambridge, MA : Blackwell.
Cita Chicago (17th ed.)
Labov, William. Principles of Linguistic Change: Volume 1, Internal Factors. Oxford, Reino Unido: Cambridge, MA : Blackwell, 1994.
Cita MLA (9th ed.)
Labov, William. Principles of Linguistic Change: Volume 1, Internal Factors. Cambridge, MA : Blackwell, 1994.
Atenció: Aquestes cites poden no estar 100% correctes.