SpringerLink (Online service), Kunii, H. S., Jajodia, S., & Soelvberg, A. (2001). Conceptual Modeling - ER 2001: 20th International Conference on Conceptual Modeling, Yokohama, Japan, November 27-30, 2001, Proceedings (1st ed. 2001.). Springer Berlin Heidelberg : Imprint: Springer. https://doi.org/10.1007/3-540-45581-7
Παραπομπή σε μορφή Chicago (17η εκδ.)SpringerLink (Online service), Hideko S. Kunii, Sushil Jajodia, και Arne Soelvberg. Conceptual Modeling - ER 2001: 20th International Conference on Conceptual Modeling, Yokohama, Japan, November 27-30, 2001, Proceedings. 1st ed. 2001. Berlin, Heidelberg: Springer Berlin Heidelberg : Imprint: Springer, 2001. https://doi.org/10.1007/3-540-45581-7.
Παραπομπή σε μορφή MLA (8th εκδ.)SpringerLink (Online service), et al. Conceptual Modeling - ER 2001: 20th International Conference on Conceptual Modeling, Yokohama, Japan, November 27-30, 2001, Proceedings. 1st ed. 2001. Springer Berlin Heidelberg : Imprint: Springer, 2001. https://doi.org/10.1007/3-540-45581-7.
