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Popkenwork, Ben (August 10, 2010). "Does The "S. Larson" Who Always Signs Citibank Customer Letters Really Exist?". Consumerist. Consumer Media LLC. Retrieved August 16, 2020. https://consumerist.com/2010/08/13/does-the-s-larson-who-always-signs-citibank-customer-letters-really-exist/
Home, Stewart (1997). Mind Invaders: A Reader in Psychic Warfare, Cultural Sabotage and Semiotic Terrorism. Indiana University: Serpent's Tail. p. 119. ISBN 1-85242-560-1. 1-85242-560-1