Ravallion, M. (1998). Poverty lines in theory and practice. World Bank.
Lua i Stíl Chicago (17ú heag.)Ravallion, Martin. Poverty Lines in Theory and Practice. Washington, DC: World Bank, 1998.
Lua MLA (8ú heag.)Ravallion, Martin. Poverty Lines in Theory and Practice. World Bank, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.