Haag, S., & Cummings, M. (2009). Information systems essentials (3rd ed. customized ed.). McGraw-Hill/Irwin.
芝加哥风格引文Haag, Stephen, 与 Maeve Cummings. Information Systems Essentials. 3rd ed. customized ed. Boston: McGraw-Hill/Irwin, 2009.
MLA引文Haag, Stephen, 与 Maeve Cummings. Information Systems Essentials. 3rd ed. customized ed. McGraw-Hill/Irwin, 2009.
警告：这些引文格式不一定是100％准确.