Updated November 2012
Agresti, Alan & Finlay, Barbara (2009):Statistical Methods for the Social Sciences, Fourth Edition. Pearson, chapters 1-3.
Bryman, Alan(2012):Social Research methods 3rd edition, Oxford: Oxford University Press. Ch. 1-7, 17, 20, 21, 23, 26-27.
Chalmers, Alan F.(1999):What is this thing called science?. Buckingham: Open University Press. Ch. 1-2, 4-10, 14-16.
Creswell, J.W. (2009): Research Design: Qualitative, Quantitative and Mixed Methods Approaches. SAGE. third edition. Ch. 1-3
Kleven, T.A. (2008). Validity and validation in qualitative and quantitative research Nordisk Pedagogik n. 3. pp. 219-233
Merton, Robert K (1973), The Normative Structure of Science. in Merton, R.K. and Norman W. Storer: The Sociology of Science, Theoretical and Empirical Investigations. Chicago: The University of Chicago Press, pp.267-278.