BPB Publications. (1990). Ingenuity Unlimited. BPB Publications.
Chicago-čujuhus (17. p.)BPB Publications. Ingenuity Unlimited. New Delhi: BPB Publications, 1990.
MLA-čujuhus (9. p.)BPB Publications. Ingenuity Unlimited. BPB Publications, 1990.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.