Ullman, J. D., & Widom, J. (2008). A first course in database systems (3rd ed.). Pearson/Prentice Hall.
芝加哥风格引文Ullman, Jeffrey D., 与 Jennifer Widom. A First Course in Database Systems. 3rd ed. Upper Saddle River, NJ: Pearson/Prentice Hall, 2008.
MLA引文Ullman, Jeffrey D., 与 Jennifer Widom. A First Course in Database Systems. 3rd ed. Pearson/Prentice Hall, 2008.
警告：这些引文格式不一定是100％准确.