Freund, J. E., & Williams, F. J. a. (1964). Elementary business statistics: The modern approach. Prentice - hall.
芝加哥风格引文Freund, John E., 与 Frank J.[et al] Williams. Elementary Business Statistics: The Modern Approach. New Jersey: Prentice - hall, 1964.
MLA引文Freund, John E., 与 Frank J.[et al] Williams. Elementary Business Statistics: The Modern Approach. Prentice - hall, 1964.
警告：这些引文格式不一定是100％准确.