Bereiter, C. (1979). Bargains galore: Mathematical thinking stories and problems. Open Court.
Chicago-čujuhus (17. p.)Bereiter, Carl. Bargains Galore: Mathematical Thinking Stories and Problems. Illinois: Open Court, 1979.
MLA-čujuhus (9. p.)Bereiter, Carl. Bargains Galore: Mathematical Thinking Stories and Problems. Open Court, 1979.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.