Não informado. (1998). Earth, Planets and Space. Terra Scientific Publishing Company.
Lua i Stíl Chicago (17ú heag.)Não informado. Earth, Planets and Space. Tokyo: Terra Scientific Publishing Company, 1998.
Lua MLA (8ú heag.)Não informado. Earth, Planets and Space. Terra Scientific Publishing Company, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.