Ehlers, E. G. (1987). Optical mineralogy. Blackwell Scientific Publications.
Lua i Stíl Chicago (17ú heag.)Ehlers, Ernest G. Optical Mineralogy. Palo Alto, Calif.: Blackwell Scientific Publications, 1987.
Lua MLA (9ú heag.)Ehlers, Ernest G. Optical Mineralogy. Blackwell Scientific Publications, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
