Ribbing, C. Hard Materials in Optics. SPIE Digital Library.
Chicago Style (17th ed.) ZitazioaRibbing, Carl. Hard Materials in Optics. SPIE Digital Library.
MLA (9th ed.) ZitazioaRibbing, Carl. Hard Materials in Optics. SPIE Digital Library.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.