Punch, K. (2005). Introduction to social research: Quantitative and qualitative approaches (2nd ed.). SAGE.
Citace podle Chicago (17th ed.)Punch, Keith. Introduction to Social Research: Quantitative and Qualitative Approaches. 2nd ed. London ; Thousand Oaks, Calif.: SAGE, 2005.
Citace podle MLA (8th ed.)Punch, Keith. Introduction to Social Research: Quantitative and Qualitative Approaches. 2nd ed. SAGE, 2005.
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