Sawyer, W. W. (1961). What is calculus about? Mathematical Association of America.
Chicago-čujuhus (17. p.)Sawyer, W. W. What Is Calculus About? Washington, D.C: Mathematical Association of America, 1961.
MLA-čujuhus (9. p.)Sawyer, W. W. What Is Calculus About? Mathematical Association of America, 1961.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.