TY  - GEN
AU  - William Labov
TI  - Principles of Linguistic Change: Internal Factors
SN  - 978-0-631-17914-6
U1  - 417.1LABP(1) 
PY  - 1994///, Reprinted 1995, 1999
CY  - Oxford, Cambridge
PB  - Blackwell Publishers
ER  -