Cita APA (7a ed.)

Labov, W. (1994). Principles of linguistic change. Blackwell.

Cita Chicago Style (17a ed.)

Labov, William. Principles of Linguistic Change. Oxford: Blackwell, 1994.

Cita MLA (9a ed.)

Labov, William. Principles of Linguistic Change. Blackwell, 1994.