Arul Khun (Michael Firewall)
Conspiracy agent
Momentum , 2007
 Buku Teks SO
Page, Bruce
The Philby conspiracy
Doubleday & Company, Inc., Garden City,, 1968
 Buku Teks SO
Conspiracy theories : the philosophical debate
edited by David Coady
Ashage, 2006
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Eagles, Paul F.J.
The planning and management of environmentally sensitive areas / Paul F.J. Eagles
Longman, 1984
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Sheldon, Sidney
Konspirasi hari kiamat = The Doomsday conspiracy
Gramedia , 2005
 Buku Teks SO