Research methods in education and psychology : integrating diversity with quantitative & qualitative approaches /

‌ Mertens, Donna M.
Հրապարակվել է 1998

Research and evaluation in education and psychology : integrating diversity with quantitative, qualitative, and mixed methods /

‌ Mertens, Donna M.
Հրապարակվել է 2005

Research and evaluation in education and psychology : integrating diversity with quantitative, qualitative, and mixed methods /

‌ Mertens, Donna M.
Հրապարակվել է 2010

Research and evaluation in education and psychology : integrating diversity with quantitative, qualitative, and mixed methods /

‌ Mertens, Donna M.
Հրապարակվել է 2015