Bex, T., & Watts, R. J. (1999). Standard English: The widening debate. Routledge.
Lua i Stíl Chicago (17ú heag.)Bex, Tony, agus Richard J. Watts. Standard English: The Widening Debate. London: Routledge, 1999.
Lua MLA (9ú heag.)Bex, Tony, agus Richard J. Watts. Standard English: The Widening Debate. Routledge, 1999.
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