Givón. (2005). Context as Other Minds. Amsterdam: John Benjamins. William Labov (1972). Sociolinguistic patterns. Philadelphia, PA: University of Pennsylvania
on www.ling.upenn.edu (页面存档备份,存于互联网档案馆) and the map at Labov, Ash, and Boberg (2006: 50). Labov, William; Sharon Ash; Charles Boberg. The Atlas of North