Fatti [Facts]


Barzun, Jacques and Henry F. Graff
[1957]  The Modern Researcher, Harcourt, Brace & World, New York, Revised Edition, 1970


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


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


Myrdal, Gunnar
[1958]  Value in Social Theory, Routledge & Kegan Paul, London, 1962


Poincaré, Henri
[1902]  La Science et l'Hypothèse, Flammarion, Paris, 1968


Runkle, Gerald
[1981]  Good Thinking. An Introduction to Logic, Holt, Rinehart and Winston, New York, Second Edition


Trusted, Jennifer
[1987]  Inquiry and Understanding, An Introduction to Explanation in the Physical and Human Sciences, Macmillan, London


Van Dalen, Deobold B.
[1962]  Understanding Educational Research. An Introduction, Mc-Graw-Hill Book Co., New York, 1979