FREUND, J. E. (1964). Modern introduction to mathematics. Prentice-Hall.
Chicago-čujuhus (17. p.)FREUND, John E. Modern Introduction to Mathematics. Englewood Cliffs: Prentice-Hall, 1964.
MLA-čujuhus (9. p.)FREUND, John E. Modern Introduction to Mathematics. Prentice-Hall, 1964.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.