Não informado. (2009). Annual Report of the Geological Survey of Arkansas. Geological Survey of Arkansas.
Lua i Stíl Chicago (17ú heag.)Não informado. Annual Report of the Geological Survey of Arkansas. Little Rock, Ark: Geological Survey of Arkansas, 2009.
Lua MLA (8ú heag.)Não informado. Annual Report of the Geological Survey of Arkansas. Geological Survey of Arkansas, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.