Não informado. Geology in the United States. Geological Society of America.
Lua i Stíl Chicago (17ú heag.)Não informado. Geology in the United States. Boston, Mass: Geological Society of America.
Lua MLA (8ú heag.)Não informado. Geology in the United States. Geological Society of America.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.