Das, B. C. (1997). Differential Calculus (1st edition.). U N Dhar.
Chicago-čujuhus (17. p.)Das, B C. Differential Calculus. 1st edition. Calcutta: U N Dhar, 1997.
MLA-čujuhus (9. p.)Das, B C. Differential Calculus. 1st edition. U N Dhar, 1997.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.