Critchley, W. (1992). Water harvesting for plant production. World Bank.
Lua i Stíl Chicago (17ú heag.)Critchley, William. Water Harvesting for Plant Production. Washington, D.C: World Bank, 1992.
Lua MLA (9ú heag.)Critchley, William. Water Harvesting for Plant Production. World Bank, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.