Tow, William T., author
Cambridge University Press, 2001
Buku Teks
Dobbs-Higginson, Michael S., author
Longman, 1993
Buku Teks
United Nations Development Programme, 1997
Buku Teks
U.S. National Committrr for Pacific Economic Corporation, 1994
Buku Teks
The Asia Foundation, 1997
Buku Teks