Dòng Nội dung
1
An introduction to sociolinguistics / Ronald Wardhaugh.
New York, NY, USA : Blackwell, 1986.
vi, 384 p. : ill. ; 23 cm.
2
Understanding English grammar : a linguistic approach / Ronald Wardhaugh
Malden, MA : Blackwell Pub., 2003
279p. ; 25 cm.