Sawyer, W. (1961). What is calculus about? Mathematical Association of America.
芝加哥风格引文Sawyer, W.W. What Is Calculus About? Washington: Mathematical Association of America, 1961.
MLA引文Sawyer, W.W. What Is Calculus About? Mathematical Association of America, 1961.
警告：这些引文格式不一定是100％准确.