Cecchi, G. Earth Surface Remote Sensing. SPIE Digital Library.
Chicago-čujuhus (17. p.)Cecchi, Giovanna. Earth Surface Remote Sensing. SPIE Digital Library.
MLA-čujuhus (9. p.)Cecchi, Giovanna. Earth Surface Remote Sensing. SPIE Digital Library.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.