SpringerLink (Online service), Weihs, C., & Gaul, W. (2005). Classification — the Ubiquitous Challenge: Proceedings of the 28th Annual Conference of the Gesellschaft für Klassifikation e.V. University of Dortmund, March 9–11, 2004. Springer Berlin Heidelberg.
Παραπομπή σε μορφή Chicago (17η εκδ.)SpringerLink (Online service), Claus Weihs, και Wolfgang Gaul. Classification — the Ubiquitous Challenge: Proceedings of the 28th Annual Conference of the Gesellschaft Für Klassifikation E.V. University of Dortmund, March 9–11, 2004. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005.
Παραπομπή σε μορφή MLA (8th εκδ.)SpringerLink (Online service), et al. Classification — the Ubiquitous Challenge: Proceedings of the 28th Annual Conference of the Gesellschaft Für Klassifikation E.V. University of Dortmund, March 9–11, 2004. Springer Berlin Heidelberg, 2005.
