Não informado. (1989). Language Variation and Change. Cambridge University Press.
Style de citation Chicago (17e éd.)Não informado. Language Variation and Change. Cambridge, Inglaterra: Cambridge University Press, 1989.
Style de citation MLA (8e éd.)Não informado. Language Variation and Change. Cambridge University Press, 1989.
Attention : ces citations peuvent ne pas être correctes à 100%.