Foundations of Mixed Methods Research :
Tashakkori, Abbas,
Foundations of Mixed Methods Research : Integrating Quantitative and Qualitative Techniques in the Social and behavioural sciences. - Sage, 2008.
0761930124 9780761930129
Foundations of Mixed Methods Research : Integrating Quantitative and Qualitative Techniques in the Social and behavioural sciences. - Sage, 2008.
0761930124 9780761930129