Bono, Edward de The Use of Lateral Thinking. London, 1967. (S=Berthoff, FTW,  64.) 

Broadbent, D.E., "The Magic Number Seven," in Studies in Long Term Memory.   ed. A. Kennedy and A. Wilkes. London, 1975. 

Bruner, Jerome, Jacqueline J. Goodnow, and George A. Austin. A Study of Thinking. NY: Science Editions, 1965. (S=The Writer's Mind, 42.) 

Chomsky, Noam. Language and Mind. NY:Harcourt Brace Jovanovich, 1972.  (S=The Writer's Mind, 42.) 

Holmes, Roger W. The Rhyme of Reason: An Invitation to Accurate and Mature Thinking. NY: D. Appleton, 1939. [S= Miles, J. Style, 183] 

Kuhn, Thomas. "Second Thoughts on Paradigms," in The Structure of Scientific Theories, ed. Frederick Suppe. Urbana, Ill.: University of  Illinois Press, 1974. 459-82. (S=The Writer's Mind, 168.) 

McCart, William F. Sound Reasoning: The Elements of Clear Thinking Cambridge, M.A.: Educational Publishing Service, 1983.  (S=EJ, Apr 84, 84.) 

Miller, G.A. "The Magic Number Seven, Plus or Minus Two," in his The Psychology of Communication. New York, 1967. 

Toulmin, Stephen. An Introduction to Reasoning. NY: Macmillan, 1979. 

_____ The Uses of Argument. Cambridge UP, 1958. 

Vygotsky, L.S. Mind in Society: The Development of Higher Psychological Processes. Ed. Michael Cole et al.. Boston: Harvard UP,  1978. [RN7, another good book] 

_____ Thought and Language. Trans. Eugenia Hanfmann & Gertrude Vakar   MIT Press, 1962. Thisan Philosophical Society1 104tice-Hall, 1982. [R.N7 a great book]