Sociolinguistics : Selected readings - Pride, J.B; Holmes, Janet; Sorensen, A.P; Labov, W.; Henderson, D.; Ferguson, C.A; Sankoff, G.; Ramanujan, A.K; Fishman, J.A; Rubin, J.; Salisbury, R.F; Ervin-Tripp, S.M; et al. (Penguin modern linguistics readings, 1972)