HALSALL FRED. (2004). DATA COMMUNICATIONS COMPUTER NETWORKS AND OPEN SYSTEMS (4TH.). PEARSON EDUCATION.
Chicago-čujuhus (17. p.)HALSALL FRED. DATA COMMUNICATIONS COMPUTER NETWORKS AND OPEN SYSTEMS. 4TH. NEW DELHI: PEARSON EDUCATION, 2004.
MLA-čujuhus (9. p.)HALSALL FRED. DATA COMMUNICATIONS COMPUTER NETWORKS AND OPEN SYSTEMS. 4TH. PEARSON EDUCATION, 2004.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.