APA (7th ed.) Citation

Sawyer, W. W. (1961). What is calculus about? Mathematical Association of America.

Chicago Style (17th ed.) Citation

Sawyer, W. W. What Is Calculus About? Washington, D.C: Mathematical Association of America, 1961.

MLA (9th ed.) Citation

Sawyer, W. W. What Is Calculus About? Mathematical Association of America, 1961.

Warning: These citations may not always be 100% accurate.