Binney, J., & Devaucouleurs, G. (1981). THE APPARENT AND TRUE ELLIPTICITIES OF GALAXIES OF DIFFERENT HUBBLE TYPES IN THE 2ND REFERENCE CATALOG.
Lua i Stíl Chicago (17ú heag.)Binney, J., agus G. Devaucouleurs. THE APPARENT AND TRUE ELLIPTICITIES OF GALAXIES OF DIFFERENT HUBBLE TYPES IN THE 2ND REFERENCE CATALOG. 1981.
Lua MLA (9ú heag.)Binney, J., agus G. Devaucouleurs. THE APPARENT AND TRUE ELLIPTICITIES OF GALAXIES OF DIFFERENT HUBBLE TYPES IN THE 2ND REFERENCE CATALOG. 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.