International Conference on Conceptual Modeling & Chen, P. P. S. (1999). Advances in conceptual modeling: ER'99 Workshops on Evolution and Change in Data Management, Reverse Engineering in Information Systems, and the World Wide Web and Conceptual Modeling, Paris, France, November 15-18, 1999 : proceedings. Springer.
Παραπομπή σε μορφή Chicago (17η εκδ.)International Conference on Conceptual Modeling και Peter P. S. Chen. Advances in Conceptual Modeling: ER'99 Workshops on Evolution and Change in Data Management, Reverse Engineering in Information Systems, and the World Wide Web and Conceptual Modeling, Paris, France, November 15-18, 1999 : Proceedings. Berlin: Springer, 1999.
Παραπομπή σε μορφή MLA (9th εκδ.)International Conference on Conceptual Modeling και Peter P. S. Chen. Advances in Conceptual Modeling: ER'99 Workshops on Evolution and Change in Data Management, Reverse Engineering in Information Systems, and the World Wide Web and Conceptual Modeling, Paris, France, November 15-18, 1999 : Proceedings. Springer, 1999.