Adair, John
Pan Books , 1988
Buku Teks
Achua, Christopher F.
South Western Cengage Learning, 2013
Buku Teks
Punch, Keith F.
Sage, 2003
Buku Teks
Punch, Keith F.
Sage Publications, 2008
Buku Teks
Wellington, Pat
Institute of South East Asia Studies, 2009
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