DUNCAN, E. R. (1972). Modern school mathematics structure and use. Houghton Mifflin co.
芝加哥风格引文DUNCAN, Ernest R. Modern School Mathematics Structure and Use. Boston: Houghton Mifflin co, 1972.
MLA引文DUNCAN, Ernest R. Modern School Mathematics Structure and Use. Houghton Mifflin co, 1972.
警告：这些引文格式不一定是100％准确.