Sawyer, W. W. (1962). What is calculus about? Mathematical Association of America.
芝加哥风格引文Sawyer, W. W. What Is Calculus About? Washington, D.C.: Mathematical Association of America, 1962.
MLA引文Sawyer, W. W. What Is Calculus About? Mathematical Association of America, 1962.
警告：这些引文格式不一定是100％准确.