Punch, K. (2005). Introduction to social research: Quantitative and qualitative approaches (2nd ed.). SAGE.
芝加哥风格引文Punch, Keith. Introduction to Social Research: Quantitative and Qualitative Approaches. 2nd ed. London ; Thousand Oaks, Calif.: SAGE, 2005.
MLA引文Punch, Keith. Introduction to Social Research: Quantitative and Qualitative Approaches. 2nd ed. SAGE, 2005.
警告：这些引文格式不一定是100％准确.