Edwards, C. W. (1963). A test of arithmetic principles, elementary form. University Microfilms.
芝加哥风格引文Edwards, Charles Walter. A Test of Arithmetic Principles, Elementary Form. [Ann Arbor, Mich: University Microfilms, 1963.
MLA引文Edwards, Charles Walter. A Test of Arithmetic Principles, Elementary Form. University Microfilms, 1963.
警告：这些引文格式不一定是100％准确.