Citazione Stile APA (7a Edizione)

Yule, G. (1985). The study of language: An introduction.

Citazione stile Chigago Style (17a edizione)

Yule, George. The Study of Language: An Introduction. Cambridge Cambridgeshire, 1985.

Citatione MLA (9a ed.)

Yule, George. The Study of Language: An Introduction. 1985.