Hoel, P. G., & Port, S. (1991). Introduction to probability theory. Universal Books Stall.
芝加哥风格引文Hoel, Paul G., 与 Sidney Port. Introduction to Probability Theory. New Delhi: Universal Books Stall, 1991.
MLA引文Hoel, Paul G., 与 Sidney Port. Introduction to Probability Theory. Universal Books Stall, 1991.
警告：这些引文格式不一定是100％准确.