Ghatak, A. Optics 7th Ed. Tata McGraw Hill.
Lua i Stíl Chicago (17ú heag.)Ghatak, Ajoy. Optics 7th Ed. Tata McGraw Hill.
Lua MLA (9ú heag.)Ghatak, Ajoy. Optics 7th Ed. Tata McGraw Hill.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.