APA (7th ed.) Citation

Labov, W. Principles of linguistic change. Blackwell.

Chicago Style (17th ed.) Citation

Labov, William. Principles of Linguistic Change. Oxford [u.a.]: Blackwell.

MLA (9th ed.) Citation

Labov, William. Principles of Linguistic Change. Blackwell.

Warning: These citations may not always be 100% accurate.