edited by Gareth Williams
Open University Press, 2003
Buku Teks
SEARO, 1998
Buku Teks
Stevens, Edward
McGraw-Hill, 1987
Buku Teks
Jacques Delors ... [and others] ; penerjemah: W.P. Napitupulu
UNESCO, 1996
Buku Teks
Russell, Bertrand, 1872-1970, author
Yayasan Obor Indonesia , 1993
Buku Teks