Al-Azhar Bulletin of Science - Basic Science Sector | Faculty of Science, Al Azhar University. Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Al-Azhar Bulletin of Science - Basic Science Sector | Faculty of Science, Al Azhar University. Cambridge University Press.
Lua MLA (9ú heag.)Al-Azhar Bulletin of Science - Basic Science Sector | Faculty of Science, Al Azhar University. Cambridge University Press.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.