Não informado. (2003). Earth science digest. Earth Science Publishing.
Lua i Stíl Chicago (17ú heag.)Não informado. Earth Science Digest. Chicago, Ill: Earth Science Publishing, 2003.
Lua MLA (8ú heag.)Não informado. Earth Science Digest. Earth Science Publishing, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.