Dudley, U. (1992). Mathematical cranks. The Mathematical Association of America.
Chicago-čujuhus (17. p.)Dudley, Underwood. Mathematical Cranks. Washington, D.C: The Mathematical Association of America, 1992.
MLA-čujuhus (9. p.)Dudley, Underwood. Mathematical Cranks. The Mathematical Association of America, 1992.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.