- ^ a b c P B, Backscheider (1989). Daniel Defoe.His Life. Baltimore and London: The Johns Hopkins University Press. p. 517.
- ^ D, Defoe (1887). An Essay Upon Projects. London, Paris, New York and Melboune: Cassell & Company.
- ^ "Social Projects". Indiana.edu. Indiana University Bloomington. 2008. Retrieved 10 September 2015.
- ^ M E, Novak (2001). Daniel Defoe. Master of Fictions. United States of America: Oxford University Press. p. 680.
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