Não informado. (1977). NASA Conference Publication. National Aeronautics and Space Administration.
Lua i Stíl Chicago (17ú heag.)Não informado. NASA Conference Publication. Washington: National Aeronautics and Space Administration, 1977.
Lua MLA (8ú heag.)Não informado. NASA Conference Publication. National Aeronautics and Space Administration, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.