Haag, S., & Cummings, M. (2006). Information Systems Essentials. McGraw Hill.
芝加哥风格引文Haag, Stephen, 与 Maeve Cummings. Information Systems Essentials. Boston: McGraw Hill, 2006.
MLA引文Haag, Stephen, 与 Maeve Cummings. Information Systems Essentials. McGraw Hill, 2006.
警告：这些引文格式不一定是100％准确.