Encyclopedia of violence, peace & conflict; Volume 2
editor-in-chief, Lester Kurtz
Academic Press, 1999
 Buku Referensi
Encyclopedia of violence, peace & conflict; Volume 3
editor-in-chief, Lester Kurtz
Academic Press, 1999
 Buku Referensi
Christie, Daniel J.
Peace, conflict, and violence
Prentice-Hall, 2001
 Buku Teks
Encyclopedia of knowledge : volume 1
Grolier Incorporated, 1991
 Buku Referensi
Encyclopedia of bioethics : volume 1
Warren Thomas Reich, editor in chief
Simon & Schuster Macmillan, 1995
 Buku Referensi