1. American Psychological Association. (2009). Publication manual of the American Psychological Association (6th ed.). Washington, DC: Author.
2. Asimov, I. (1964). Watson, John Broadus. In In Asimov’s biographical encyclopedia of science and technology. New York, NY: Doubleday.
3. Augustyn, A. (2017). John B. Watson. In Encyclopaedia Britannica. Retrieved November 16, 2017, from https://www.britannica.com/biography/John-B-Watson
4. Bibliography: John B. Watson (n.d.). Papers of John B. Watson (box 1). Library of Congress. Washington, DC: Library of Congress.
5. Block, M. (1942). Watson, John B (roadus). In Current biography: Who’s news and why (pp. 80–82). Hackensack, NJ: H. W. Wilson.