Sawyer, W. W. (1962). What is calculus about? Mathematical Association of America.
Lua i Stíl Chicago (17ú heag.)Sawyer, W. W. What Is Calculus About? Washington, D.C.: Mathematical Association of America, 1962.
Lua MLA (9ú heag.)Sawyer, W. W. What Is Calculus About? Mathematical Association of America, 1962.
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