Não informado. (2018). Special Publication. University of Kentucky, Kentucky Geological Survey.
Lua i Stíl Chicago (17ú heag.)Não informado. Special Publication. Lexington, Ky: University of Kentucky, Kentucky Geological Survey, 2018.
Lua MLA (8ú heag.)Não informado. Special Publication. University of Kentucky, Kentucky Geological Survey, 2018.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.