Freund, J. E., & Williams, F. J. (1982). Elementary business statistics: The modern approach (4th ed.). Prentice-Hall.
芝加哥风格引文Freund, John E., 与 Frank Jefferson Williams. Elementary Business Statistics: The Modern Approach. 4th ed. Englewood Cliffs, N.J.: Prentice-Hall, 1982.
MLA引文Freund, John E., 与 Frank Jefferson Williams. Elementary Business Statistics: The Modern Approach. 4th ed. Prentice-Hall, 1982.
警告：这些引文格式不一定是100％准确.