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Buku Referensi
Andaya, Barbara Watson, author
Cambridge University Press, 2015
Buku Teks
Vickers, Adrian, author
Cambridge University Press, 2010
Buku Teks
Bastin, John, author
Prentice Hall of Australia, 1977
Buku Teks
C.P.F Luhulima ... [et al.]
Sekretariat Nasional ASEAN, 1994
Buku Teks