Orwing, G. W. (1984). The computer tutor: IBM personal computer edition: learning Activities for the IBM PC and PCjr. Little, Brown.
Chicago-čujuhus (17. p.)Orwing, Gary W. The Computer Tutor: IBM Personal Computer Edition: Learning Activities for the IBM PC and PCjr. Little, Brown, 1984.
MLA-čujuhus (9. p.)Orwing, Gary W. The Computer Tutor: IBM Personal Computer Edition: Learning Activities for the IBM PC and PCjr. Little, Brown, 1984.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.