Punch, K. (2005). Introduction to social research: Quantitative and qualitative approaches (2nd Ed.). SAGE Publications.
Citace podle Chicago (17th ed.)Punch, Keith. Introduction to Social Research: Quantitative and Qualitative Approaches. 2nd Ed. London ; Thousand Oaks, Calif.: SAGE Publications, 2005.
Citace podle MLA (9th ed.)Punch, Keith. Introduction to Social Research: Quantitative and Qualitative Approaches. 2nd Ed. SAGE Publications, 2005.
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