Best, Steven, author
Guildford Press, 1991
Buku Teks
Mazzucchelli, Marco, author
Springer, 2012
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Peltonen, Tuomo, author
Emerald, 2016
eBooks
Michael Frederick Hofmeyr, author
Graduate School of Language and Culture, Osaka University, 2018
Artikel Jurnal
Kailash C.Baral, editor
Routledge, 2009
Buku Teks