Alex Watson, author
Center for Asian and Pacific Studies, Seikei University, 2020
Artikel Jurnal
Bjerre, Jens
William Morroe, [date of publication not identified]
Buku Teks
Riggs, Ransom, author
Syndrigast, 2016
Buku Teks
Lewis, I.M.
Cambridge University Press , 1996
Buku Teks