Freeman, C. Optics in Security and Law Enforcement I. SPIE Digital Library.
Chicago-čujuhus (17. p.)Freeman, Charles. Optics in Security and Law Enforcement I. SPIE Digital Library.
MLA-čujuhus (9. p.)Freeman, Charles. Optics in Security and Law Enforcement I. SPIE Digital Library.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.