Bell, Philip Brian and Philip James Staines
[1981]  Reasoning and Argument in Psychology, Routledge & Kegan Paul, London [Chapter 3]


Borger, Robert and Frank Cioffi, editors
[1970]  Explanation in the Behavioural Sciences, Cambridge University Press, Cambridge, 1975


Bunge, Mario
[1963]  Causality and Modern Science, Dover Publications, New York, Third Revised Edition, 1979  [Chapter 11]


Caws, Peter
[1965]  The Philosophy of Science, D. Van Nostrand, Princeton, New Jersey


Copi, Irving M.
[1953]  Introduction to Logic, Macmillan, New York, Sixth Edition, 1982 [Chapter 13]


Harré, R.
[1960]  An Introduction to the Logic of the Sciences, Macmillan & Co., London, 1963  [Part one]


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


Nagel, Ernest
[1960]  The Structure of Science, Hackett Publishing, Indianapolis, Second Edition, 1979


Reynolds, Paul Davidson
[1971]  A Primer in Theory Construction, Macmillan Publishing Co., New York, 1986


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