Ennis, R. “A Taxonomy of Critical Thinking Dispositions and Abilities.” In Joan Baron and Robert Sternberg (Eds.), Teaching Thinking Skills: Theory and Practice. New York: W.H. Freeman, 1987.
Glaser, E. "An Experiment in the Development of Critical Thinking." Teacher’s College Record, vol. 43, no. 5, 1942, pp. 409-410.
Scriven, M., and R. Paul. “Defining Critical Thinking.” Retrieved from the Foundation for Critical Thinking website 19 December 2010. www.criticalthinking .org.
Carnegie, D. How to Win Friends & Influence People. New York: Simon & Schuster, 2009.
Dewey, J. How We Think: A Restatement of the Relation of Reflective Thinking to the Educative Process. Boston: Hough ton Mifflin, 1933.