(1997). Strategies for The Prevention of Blindness in National Programmes.
Chicago-čujuhus (17. p.)Strategies for The Prevention of Blindness in National Programmes. 1997.
MLA-čujuhus (9. p.)Strategies for The Prevention of Blindness in National Programmes. 1997.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.