Attitudes to languages / Peter Garret
Cambridge University Press, 2010
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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
Wolff, John U.
Communicative codes in Central Java
Deprtment of Asian Studies, 1982
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Trudgill, Peter
Sociolinguistics : an introduction to language and society / Peter Trudgill
Penguin, 1995
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