edited by Malcolm Warner
Business Press, 2000
Buku Referensi
Institute of Southeast Asian studies, 1991
Buku Teks
Bartol, Kathryn
McGraw-Hill, 2001
Buku Teks
Harper & Row, 1975
Buku Teks
Thomas Diefenbach
Ritsumeikan Asia Pacific University (APU), 2015
Artikel Jurnal