Bartlett, F.C.
[1932]  Remembering. A study in experimental and social psychology, Cambridge University Press, Cambridge, 1972


Boulding, Kenneth E.
[1956]  The Image. Knowledge in Life and Society, The University of Michigan Press, 1961


Hanfling, Oswald editor
[1981]  Essential Readings in Logical Positivism, Blackwell, Oxford


Kaplan, Abraham
[1964]  The Conduct of Inquiry. Methodology for Behavioral Science, Chandler Publishing Company, Scranton, Pennsylvania


Langer, Susanne K.
[1942]  Philosophy in a New Key, Harvard University Press, Cambridge, Massachusetts, 1957


Ogden,  C. K. and I. A. Richards
[1923]  The Meaning of Meaning, Routledge & Kegan Paul, London, 1972


Price, H. H.
[1953]  Thinking and Experience, Hutchinson, London


Young, Arthur M.
[1976]  The Geometry of Meaning,  Delacorte Press, USA