Fromkin, Victoria A.
An introduction to language
Holt, Rinehart and Winston, 1981
 Buku Teks SO
Frontier of foreign language education
Osaka University
Osaka University, 2020
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Gebhard, Jerry G.
Language teaching awareness: a guide to exploring beliefs and practices
Cambridge University Press, 1999
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Klein, Wolfgang
Time in language
Routledge , 1997
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Beard, Adrian
Language change
Routledge, 2004
 Buku Teks SO