Creswell, J. W. 4. (1994). Research design: Qualitative and quantitative approaches. London : Sage Publications.
Chicago Style (17th ed.) CitationCreswell, John W. 401571. Research Design: Qualitative and Quantitative Approaches. London : Sage Publications, 1994.
MLA citiranjeCreswell, John W. 401571. Research Design: Qualitative and Quantitative Approaches. London : Sage Publications, 1994.
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