Alfonso, Anthony, author
Sophia University LL Center of Applied Linguistics, 1980
Buku Teks
Lebra,Takie Sugiyama
University of Hawaii Press, 1976
Buku Teks
Kiyoyuki, Nishihara, author
Japan Publications, 1968
Buku Teks
Buranapatana, Maliwan, author
Graduate School of Language and Culture, Osaka University, 2018
Artikel Jurnal
Stroik, Thomas S., author
Cambridge University Press, 2013
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