NA. Science Factory - LIGHT & SIGHT. S. Chand Publishing.
Lua i Stíl Chicago (17ú heag.)NA. Science Factory - LIGHT & SIGHT. S. Chand Publishing.
Lua MLA (9ú heag.)NA. Science Factory - LIGHT & SIGHT. S. Chand Publishing.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.