Bello, I. (2006). Basic college mathematics: Realworld approach (2nd ed.). McGraw - Hill.
Chicago-čujuhus (17. p.)Bello, Ignacio. Basic College Mathematics: Realworld Approach. 2nd ed. Boston: McGraw - Hill, 2006.
MLA-čujuhus (9. p.)Bello, Ignacio. Basic College Mathematics: Realworld Approach. 2nd ed. McGraw - Hill, 2006.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.