Integrating qualitative and quantitative methods : a pragmatic approach / David L. Morgan. - Print
Practical research : planning and design / Paul D. Leedy and Jeanne Ellis Ormrod. - Print
Qualitative research : a guide to design and implementation / Sharan B. Merriam, Elizabeth J. Tisdell. - Print
Qualitative research from start to finish / Robert K. Yin - E-book
Research design : qualitative, quantitative, and mixed methods approaches / John W. Creswell.
Research methodology : a step-by-step guide for beginners / Ranjit Kumar. - Print