Gasser, Morrie (1988). Building a Secure Computer System(PDF) (به انگلیسی). Van Nostrand Reinhold. p. 3. Archived from the original(PDF) on 25 September 2015. Retrieved 20 September 2016.
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Gasser, Morrie (1988). Building a Secure Computer System(PDF) (به انگلیسی). Van Nostrand Reinhold. p. 3. Archived from the original(PDF) on 25 September 2015. Retrieved 20 September 2016.