Beard, Adrian
Language change
Routledge, 2004
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Cooper, Robert L.
Language planning and social change
Cambridge University Press, 1989
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Aitchison, Jean, 1938-
Language change : progress or decay?
Cambridge University Press, 2001
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Language change in East Asia
T.E. McAuley
Curzon Press, 2001
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Jones, Mari C.
Exploring language change
Routledge , 2006
 Buku Teks SO