Heine, Bernd
Language contact and grammatical change
Cambridge University Press, 2005
 Buku Teks SO
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
Keller, Rudi
On language change : the invisible hand in language / Rudi Keller
Routledge, 1994
 Buku Teks SO
Jones, Mari C.
Exploring language change
Routledge , 2006
 Buku Teks SO