Liu, C. . L. (1968). Introduction to combinatorial mathematics. McGraw-Hill.
芝加哥风格引文Liu, C L. Introduction to Combinatorial Mathematics. New York: McGraw-Hill, 1968.
MLA引文Liu, C L. Introduction to Combinatorial Mathematics. McGraw-Hill, 1968.
警告：这些引文格式不一定是100％准确.