Eco, Umberto
The search for the perfect language
Fontana, 1997
Buku Teks SO
Appel, René
Language contact and bilingualism
Edward Arnold, 1988
Buku Teks
Heine, Bernd
Language contact and grammatical change
Cambridge University Press, 2005
Buku Teks SO
The handbook of language contact
edited by Raymond Hickey
Wiley-Blackwell, 2010
Buku Teks SO
Language contact / Yaron Matras
Cambridge University Press, 2009
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