Kodansha International, 1999
Buku Teks
Bonner, Thomas Neville, author
Prentice-Hall, 1963
Buku Teks
Edited by Kader Asmal, Davud Chidester, Wilmot James
Abacus, 2013
Buku Teks
Gray, Richard, 1944-, author
Longman, 1991
Buku Teks
Berkowitz, Gerald M., author
Longman, 1994
Buku Teks