Source : Richard Marcinko (1997). “Leadership Secrets of the Rogue Warrior: A Commando's Guide to Success”
Richard MarcinkoSource : Luke Davies (2002). “Isabelle the Navigator”, p.63, Penguin
Source : Peter R. Breggin, M.D. (2015). “Toxic Psychiatry: Why Therapy, Empathy and Love Must Replace the Drugs, Electroshock, and Biochemical Theories of the "New Psychiatry"”, p.499, St. Martin's Griffin
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