SpringerLink (Online service), Li, Q., Spaccapietra, S., Yu, E., & Olivé, A. (2008). Conceptual Modeling - ER 2008: 27th International Conference on Conceptual Modeling, Barcelona, Spain, October 20-24, 2008. Proceedings. Springer Berlin Heidelberg : Imprint: Springer.
Παραπομπή σε μορφή Chicago (17η εκδ.)SpringerLink (Online service), Qing Li, Stefano Spaccapietra, Eric Yu, και Antoni Olivé. Conceptual Modeling - ER 2008: 27th International Conference on Conceptual Modeling, Barcelona, Spain, October 20-24, 2008. Proceedings. Berlin, Heidelberg: Springer Berlin Heidelberg : Imprint: Springer, 2008.
Παραπομπή σε μορφή MLA (8th εκδ.)SpringerLink (Online service), et al. Conceptual Modeling - ER 2008: 27th International Conference on Conceptual Modeling, Barcelona, Spain, October 20-24, 2008. Proceedings. Springer Berlin Heidelberg : Imprint: Springer, 2008.
