APA

Spolsky B. W. E., .Sociolinguistics:Oxford Introdution To Language Study. New York:Oxford University Press,1998: .

Chicago

Spolsky Bernard Widdowson,H.G Editor, .Sociolinguistics:Oxford Introdution To Language Study. New York:Oxford University Press,1998: .

Harvard

Spolsky B. W. E., .Sociolinguistics:Oxford Introdution To Language Study. New York:Oxford University Press,1998: .

MLA

Spolsky Bernard Widdowson,H.G Editor, .New York:Oxford University Press,1998: . .