Wilford, J. N. (1998). Scientists seeking for universe's missing energy. Today.
Lua i Stíl Chicago (17ú heag.)Wilford, John Noble. "Scientists Seeking for Universe's Missing Energy." Today 1998.
Lua MLA (9ú heag.)Wilford, John Noble. "Scientists Seeking for Universe's Missing Energy." Today, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.