Patrick, John
Macmillan Publishing Company, 1984
Buku Teks
Schwarz, Adam, author
Allen & Unwin, 1994
Buku Teks
Kaligis, O.C. (Otto Cornelis), 1942-, author
O.C. Kaligis & Associates, 2006
Buku Teks
Kodansha International : Distributed in the United States by Kodansha America, 1994.
Buku Teks
Reischauer, Edwin O., author
Tuttle, 1972
Buku Teks