SINGAL, M. (1976). Sets and numbers (2nd ed.). R.Chand.
Chicago-čujuhus (17. p.)SINGAL, M.K. Sets and Numbers. 2nd ed. New Delhi: R.Chand, 1976.
MLA-čujuhus (9. p.)SINGAL, M.K. Sets and Numbers. 2nd ed. R.Chand, 1976.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.