Não informado. (1982). National Water Conditions. U.S. Department of the Interior, Geological Survey.
Lua i Stíl Chicago (17ú heag.)Não informado. National Water Conditions. Reston, Va: U.S. Department of the Interior, Geological Survey, 1982.
Lua MLA (8ú heag.)Não informado. National Water Conditions. U.S. Department of the Interior, Geological Survey, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.