JOHNSON, L. M. (1994). Elementary algebra. Harper Collins College Publishers.
Chicago-čujuhus (17. p.)JOHNSON, L. Murphy. Elementary Algebra. Harper Collins College Publishers, 1994.
MLA-čujuhus (9. p.)JOHNSON, L. Murphy. Elementary Algebra. Harper Collins College Publishers, 1994.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.