Klein, F. (1939). Elementary mathematics from an advanced standpoint. Dover.
Chicago-čujuhus (17. p.)Klein, Felix. Elementary Mathematics from an Advanced Standpoint. Nueva York: Dover, 1939.
MLA-čujuhus (9. p.)Klein, Felix. Elementary Mathematics from an Advanced Standpoint. Dover, 1939.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.