Não informado. (2010). The American Geologist. Geological Publishing House.
Lua i Stíl Chicago (17ú heag.)Não informado. The American Geologist. Minneapolis, Minn: Geological Publishing House, 2010.
Lua MLA (8ú heag.)Não informado. The American Geologist. Geological Publishing House, 2010.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.