4 1 10 Planning, Conducting, and Evaluating Quantitative and Qualitative Research John W. Creswell Primary Author mixed material 9780131367395 Boston Pearson 2019 John W. Creswell Primary Author Vicki L. Plano Clark Primary Author mixed material Sage 2011 content.jpg.jpg John W. Creswell Primary Author mixed material 9781412916073 Sage 2007 Qualtative_Inquiry_%26_Research_Design.png.png qualitative, quantitative, and mixed methods approaches John W. Creswell Primary Author mixed material 9781452226101 Sage 2014 Research_design_qualitative%2C_quantitative%2C_and_mixed_methods_approaches.png.png