(1989). UniVerse: System description manual. Natick, Man. : VMARK Software.
Chicago-čujuhus (17. p.)UniVerse: System Description Manual. Natick, Man. : VMARK Software, 1989.
MLA-čujuhus (9. p.)UniVerse: System Description Manual. Natick, Man. : VMARK Software, 1989.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.