Simpson, A. (1993). Mastering wordperfected 6 for Dos. BPB.pub.
Chicago-čujuhus (17. p.)Simpson, Alan. Mastering Wordperfected 6 for Dos. New Delhi: BPB.pub, 1993.
MLA-čujuhus (9. p.)Simpson, Alan. Mastering Wordperfected 6 for Dos. BPB.pub, 1993.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.