Creswell, J. W. (1994). Research design: Qualitative & quantitative approaches. Sage.
芝加哥风格引文Creswell, John W. Research Design: Qualitative & Quantitative Approaches. Thousand Oaks, California: Sage, 1994.
MLA引文Creswell, John W. Research Design: Qualitative & Quantitative Approaches. Sage, 1994.
警告：这些引文格式不一定是100％准确.