Creswell, J. W. 4. (1994). Research design: Qualitative and quantitative approaches. London : Sage Publications.
Citación estilo ChicagoCreswell, John W. 401571. Research Design: Qualitative and Quantitative Approaches. London : Sage Publications, 1994.
Cita MLACreswell, John W. 401571. Research Design: Qualitative and Quantitative Approaches. London : Sage Publications, 1994.
Warning: These citations may not always be 100% accurate.