Food and Agriculture Organization of the United Nations. Land and Water Development Division. (1974). Soil survey in irrigation investigations. FAO.
Lua i Stíl Chicago (17ú heag.)Food and Agriculture Organization of the United Nations. Land and Water Development Division. Soil Survey in Irrigation Investigations. Rome: FAO, 1974.
Lua MLA (9ú heag.)Food and Agriculture Organization of the United Nations. Land and Water Development Division. Soil Survey in Irrigation Investigations. FAO, 1974.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.