Ball, William Macmahon
Thomas Nelson, 1969
Buku Teks
Yayasan Proklamasi, 1984
Buku Teks
edited by Takashi Shiraishi, Jiro Okamoto
Institute of South East Asia Studies, 2012
eBooks
Hiroshima University
Hiroshima University , 1997
Buku Teks
The Japan Foundation
The Japan Foundation, 1977
Buku Teks