(1996). Manual on GIS for planners and decision makers. United Nations.
Lua i Stíl Chicago (17ú heag.)Manual on GIS for Planners and Decision Makers. New York: United Nations, 1996.
Lua MLA (8ú heag.)Manual on GIS for Planners and Decision Makers. United Nations, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.