Freund, J. E. (1981). Statistics: A first course (2nd ed.). Prentice Hall.
芝加哥风格引文Freund, John E. Statistics: A First Course. 2nd ed. Englewood Cliffs, NJ : New Jersey: Prentice Hall, 1981.
MLA引文Freund, John E. Statistics: A First Course. 2nd ed. Prentice Hall, 1981.
警告：这些引文格式不一定是100％准确.