APA

Yule G. ت., .The Study Of Language. New York:Cambridge University Press.2006: .

Chicago

Yule George تأليف, .The Study Of Language. New York:Cambridge University Press.2006: .

Harvard

Yule G. ت., .The Study Of Language. New York:Cambridge University Press.2006: .

MLA

Yule George تأليف, .New York:Cambridge University Press.2006: . .