Levene, M. (1992). The nested universal relation database model. Springer-Verlag.
芝加哥风格引文Levene, M. The Nested Universal Relation Database Model. Berlin ; New York: Springer-Verlag, 1992.
MLA引文Levene, M. The Nested Universal Relation Database Model. Springer-Verlag, 1992.
警告：这些引文格式不一定是100％准确.