Wardhaugh, Ronald An introduction to sociolinguistics / Ronald Wardhaugh, Janet M. Fuller - 7th Edition - Published : Wiley, 2015 - 427 p. ; 28 cm. ISBN: 9781118732298 Subjects--Topical Terms: Sociolinguistics Subjects--Index Terms: Ngôn ngữ học xã hội Dewey Class. No.: 306.44 / WAR