Holland, J., & Campbell, J. (2005). Methods in development research: Combining qualitative and quantitative approaches. ITDG Publishing.
Lua i Stíl Chicago (17ú heag.)Holland, Jeremy, agus John Campbell. Methods in Development Research: Combining Qualitative and Quantitative Approaches. Rugby, Warwickshire, [England]: ITDG Publishing, 2005.
Lua MLA (9ú heag.)Holland, Jeremy, agus John Campbell. Methods in Development Research: Combining Qualitative and Quantitative Approaches. ITDG Publishing, 2005.
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