Guillaume Thomas François RAYNAL, John Obadiah JUSTAMOND (1783). “A Philosophical and Political History of the Settlements and Trade of the Europeans in the East and West Indies. Translated ... by J. Justamond, M. A. The third edition: revised and corrected. With maps adapted to the work and a copious index”, p.349
"Beyond Economics: Essays on Society, Religion, and Ethics" by Kenneth E. Boulding (p. 141), as quoted in "Evolutionary Economics and Human Nature" by John Laurent, (p. 175), 2003.