OPERATION. (1998). Operation research. ITN.
Chicago-čujuhus (17. p.)OPERATION. Operation Research. Malang: ITN, 1998.
MLA-čujuhus (9. p.)OPERATION. Operation Research. ITN, 1998.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.