SpringerLink (Online service), Heuser, C. A., & Pernul, G. (2009). Advances in Conceptual Modeling - Challenging Perspectives: ER 2009 Workshops CoMoL, ETheCoM, FP-UML, MOST-ONISW, QoIS, RIGiM, SeCoGIS, Gramado, Brazil, November 9-12, 2009. Proceedings. Springer Berlin Heidelberg.
Παραπομπή σε μορφή Chicago (17η εκδ.)SpringerLink (Online service), Carlos Alberto Heuser, και Günther Pernul. Advances in Conceptual Modeling - Challenging Perspectives: ER 2009 Workshops CoMoL, ETheCoM, FP-UML, MOST-ONISW, QoIS, RIGiM, SeCoGIS, Gramado, Brazil, November 9-12, 2009. Proceedings. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009.
Παραπομπή σε μορφή MLA (8th εκδ.)SpringerLink (Online service), et al. Advances in Conceptual Modeling - Challenging Perspectives: ER 2009 Workshops CoMoL, ETheCoM, FP-UML, MOST-ONISW, QoIS, RIGiM, SeCoGIS, Gramado, Brazil, November 9-12, 2009. Proceedings. Springer Berlin Heidelberg, 2009.
