Day, R. A., & Underwood, A. L. 1. (1991). Quantitative analysis (6th ed.). Prentice Hall Intenational.
芝加哥风格引文Day, Reuben Alexander, 与 Arthur Louis 1924 Underwood. Quantitative Analysis. 6th ed. Englewooe Cliffs, NJ: Prentice Hall Intenational, 1991.
MLA引文Day, Reuben Alexander, 与 Arthur Louis 1924 Underwood. Quantitative Analysis. 6th ed. Prentice Hall Intenational, 1991.
警告：这些引文格式不一定是100％准确.