Creswell, J. W. (2013). Research Design: Qualitative , Quantitative & Mixed Methods Approaches (3rd ed.). sage.
芝加哥风格引文Creswell, John W. Research Design: Qualitative , Quantitative & Mixed Methods Approaches. 3rd ed. New Delhi: sage, 2013.
MLA引文Creswell, John W. Research Design: Qualitative , Quantitative & Mixed Methods Approaches. 3rd ed. sage, 2013.
警告：这些引文格式不一定是100％准确.