The SAGE Handbook of Qualitative Research by 
Qualitative Methods in Social Work Research by 
Doing Qualitative Research in Social Work by For additional titles try a library catalog subject search for Social service -- Statistical methods or Social sciences -- Statistical methods.
Basic Statistics for Social Workers by 
Statistics and Data Interpretation for Social Work by 
The SAGE Dictionary of Statistics by These books involve both qualitative and quantitative approaches.
Encyclopedia of Social Measurement by 
Essential Research Methods for Social Work by 
The Handbook of Social Work Research Methods by 
The SAGE Dictionary of Social Research Methods by 
The SAGE Encyclopedia of Social Science Research Methods by 
The SAGE Handbook of Social Work Research by 
Critical and Creative Social Work Research Methodologies by 
