Não informado. Science news letter. Science Service.
Lua i Stíl Chicago (17ú heag.)Não informado. Science News Letter. Washington: Science Service.
Lua MLA (8ú heag.)Não informado. Science News Letter. Science Service.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.