Citazione APA

Widdowson, H. G. (1979). Explorations in applied linguistics. Oxford University Press.

Stile di citazione Chicago

Widdowson, H G. Explorations in Applied Linguistics. New york: Oxford University Press, 1979.

Citazione MLA

Widdowson, H G. Explorations in Applied Linguistics. Oxford University Press, 1979.