SpringerLink (Online service), Düsterhöft, A., Klettke, M., & Schewe, K. (2012). Conceptual Modelling and Its Theoretical Foundations: Essays Dedicated to Bernhard Thalheim on the Occasion of His 60th Birthday. Springer Berlin Heidelberg : Imprint: Springer.
Παραπομπή σε μορφή Chicago (17η εκδ.)SpringerLink (Online service), Antje Düsterhöft, Meike Klettke, και Klaus-Dieter Schewe. Conceptual Modelling and Its Theoretical Foundations: Essays Dedicated to Bernhard Thalheim on the Occasion of His 60th Birthday. Berlin, Heidelberg: Springer Berlin Heidelberg : Imprint: Springer, 2012.
Παραπομπή σε μορφή MLA (8th εκδ.)SpringerLink (Online service), et al. Conceptual Modelling and Its Theoretical Foundations: Essays Dedicated to Bernhard Thalheim on the Occasion of His 60th Birthday. Springer Berlin Heidelberg : Imprint: Springer, 2012.
