GUPTA I.C. (1994). T.B. OF ENGG. METROLOGY. DHANPAT RAI & SONS.
Chicago-čujuhus (17. p.)GUPTA I.C. T.B. OF ENGG. METROLOGY. DHANPAT RAI & SONS, 1994.
MLA-čujuhus (9. p.)GUPTA I.C. T.B. OF ENGG. METROLOGY. DHANPAT RAI & SONS, 1994.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.