Aitchison, Jean, 1938-
Language change : progress or decay?
Cambridge University Press, 2001
 Buku Teks SO
Aitchison, Jean, 1938-
Language change : progress or decay?
Cambridge University Press, 2013
 Buku Teks SO
Heine, Bernd
Language contact and grammatical change
Cambridge University Press, 2005
 Buku Teks SO
Heine, Bernd
Language contact and grammatical change
Cambridge University Press, 2005
 Buku Teks SO
Motives for language change / edited by Raymond Hickey
edited by Raymond Hickey
Cambridge University Press, 2004
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