Rosenberg, Donna
Buku Teks
Ople, Blas F. author
Institute for Public Policy, 2001
Buku Teks
Hong Jong-son, Pak Young-son, Sok Geum-ho, Umeda Hiroyuki
Pagijong Press, 2008
Buku Teks
Tagore, Rabindranath, 1861-1941, author
Penguin Books, 1985
Buku Teks
Katzner, Kenneth, author
Routledge, 1995
Buku Referensi