Easton, V.J., McColl, J.H., and Young, S.G. (update). (1997) STEPS Statistical Glossary v1.1
www.stats.gla.ac.uk/steps/glossary/index.php
World Bank Participation Sourcebook - Appendix 1: Methods and tools - Glossary of Tools
www.worldbank.org/wbi/sourcebook/ sba110.php
The SL Distance Learning Guide Glossary, DFID
www.livelihoods.org/info/dlg/GLOSS/Glossary.php