Hastie, Reid, author
Sage Published, 2010
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Peterson, Jim, author
Emerald, 2017
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Paseta, Senia, author
Oxford University Press, 2016
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Pinit Ngamsom, author
Thammasat University, 2018
Artikel Jurnal
Tuttle, Matthew, author
John Wiley & Sons, 2009
Buku Teks