Encyclopaedia of Social research (v.2): areas and tools of social research/

Cyhoeddwyd 1997

Encyclopaedia of social research (v.3): data collection, analysis and interpretation in social research/

Cyhoeddwyd 1997

Encyclopaedia of Social research (v.4): statistical methods in social research/

gan Laxmi Devi (ed.)
Cyhoeddwyd 1997

Encyclopaedia of social research (v.5): reporting in social research/

Cyhoeddwyd 1997

The social science encyclopaedia/

Cyhoeddwyd 2003