LING 1100.105: Language, Thought, and Reality: English Outside the Box (Spring 2009)  Tags: linguistics_language_literature  

Bright, William (1997), Social Factors in Language Change, p 83 in
Coulmas, Florian [ed] The Handbook of Sociolinguistics. Oxford, England:Blackwell.

William Labov, 1963. "The social motivation of a sound change." Word
19.273-309.

Labov, William (1994, 2001), Principles of Linguistic Change (vol.I
Internal Factors, 1994; vol.II Social Factors, 2001), Blackwell.

Note: These citations are not in perfect citation format. You'll see alot of that, unfortunately, especially in self-published material on the web.