HELD, G. (2001). VOICE & DATA INTERNETWORKING 3RD EDI. TATA MCGRAW HILL.
Chicago-čujuhus (17. p.)HELD, GIL. VOICE & DATA INTERNETWORKING 3RD EDI. NEW DELHI: TATA MCGRAW HILL, 2001.
MLA-čujuhus (9. p.)HELD, GIL. VOICE & DATA INTERNETWORKING 3RD EDI. TATA MCGRAW HILL, 2001.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.