1. Allen, R. C. (1999). David Hartley on human nature. Albany, NY: State University of New York Press.
2. Aubert, D., & Whitaker, H. (1996). David Hartley’s model of vibratiuncles as a contribution to localization theory of brain functions, with a side note on short-term memory. History and Philosophy of Psychology Bulletin, 8, 14–16.
3. Barbour, I. (1997). Religion and science. New York: HarperCollins.
4. Bower, G. S. (1881). Hartley and James Mill. London.
5. Boynton, H. (1948). The beginnings of modern science. Scientific writings of the 16th, 17th and 18th centuries. Roslyn, NY: Walter J. Black, Inc.