SpringerLink (Online service), Akoka, J., Bouzeghoub, M., Comyn-Wattiau, I., & Metais, E. (1999). Conceptual Modeling ER'99: 18th International Conference on Conceptual Modeling Paris, France, November 15-18, 1999 Proceedings (1st ed. 1999.). Springer Berlin Heidelberg : Imprint: Springer. https://doi.org/10.1007/3-540-47866-3
Παραπομπή σε μορφή Chicago (17η εκδ.)SpringerLink (Online service), Jacky Akoka, Mokrane Bouzeghoub, Isabelle Comyn-Wattiau, και Elisabeth Metais. Conceptual Modeling ER'99: 18th International Conference on Conceptual Modeling Paris, France, November 15-18, 1999 Proceedings. 1st ed. 1999. Berlin, Heidelberg: Springer Berlin Heidelberg : Imprint: Springer, 1999. https://doi.org/10.1007/3-540-47866-3.
Παραπομπή σε μορφή MLA (8th εκδ.)SpringerLink (Online service), et al. Conceptual Modeling ER'99: 18th International Conference on Conceptual Modeling Paris, France, November 15-18, 1999 Proceedings. 1st ed. 1999. Springer Berlin Heidelberg : Imprint: Springer, 1999. https://doi.org/10.1007/3-540-47866-3.
