STEPHENS, R. T. (1977). Worktext in intermediate algebra. West Pub. Co.
Chicago-čujuhus (17. p.)STEPHENS, Robert T. Worktext in Intermediate Algebra. St. Paul: West Pub. Co, 1977.
MLA-čujuhus (9. p.)STEPHENS, Robert T. Worktext in Intermediate Algebra. West Pub. Co, 1977.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.