(2011). GLOSSARY of Geology. American Geosciences Institute.
Lua i Stíl Chicago (17ú heag.)GLOSSARY of Geology. American Geosciences Institute, 2011.
Lua MLA (9ú heag.)GLOSSARY of Geology. American Geosciences Institute, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.