Perles, B. M., & Sullivan, C. (1970). Freund and Williams' Modern business statistics. Pitman.
芝加哥风格引文Perles, Benjamin M., 与 Charles Sullivan. Freund and Williams' Modern Business Statistics. London: Pitman, 1970.
MLA引文Perles, Benjamin M., 与 Charles Sullivan. Freund and Williams' Modern Business Statistics. Pitman, 1970.
警告：这些引文格式不一定是100％准确.