APA

Widdowson H. ت., .Discourse Analysis. New York:Oxford University Press,2011: .

Chicago

Widdowson H.G تأليف, .Discourse Analysis. New York:Oxford University Press,2011: .

Harvard

Widdowson H. ت., .Discourse Analysis. New York:Oxford University Press,2011: .

MLA

Widdowson H.G تأليف, .New York:Oxford University Press,2011: . .