Wheeler, Ruric E.
John Wiley & Sons, 1979
Buku Teks SO
Artikel Jurnal
Fernando C.
Universitas Indonesia, 1996
UI - Laporan Penelitian
Asako Nakai
Center for Asian and Pacific Studies, Seikei University, 2017
Artikel Jurnal
Amringe, Judyth van
Bulfinch Press Book, 1994
Buku Teks