Não informado. (2004). Environmental geology notes. Illinois State Geological Survey.
Lua i Stíl Chicago (17ú heag.)Não informado. Environmental Geology Notes. Naperville, Ill: Illinois State Geological Survey, 2004.
Lua MLA (8ú heag.)Não informado. Environmental Geology Notes. Illinois State Geological Survey, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.