Freund, J. E. (1967). Modern elementary statistics (3d ed.). Prentice-Hall.
芝加哥风格引文Freund, John E. Modern Elementary Statistics. 3d ed. Englewood Cliffs, N.J.: Prentice-Hall, 1967.
MLA引文Freund, John E. Modern Elementary Statistics. 3d ed. Prentice-Hall, 1967.
警告：这些引文格式不一定是100％准确.