SpringerLink (Online service), Zimmermann, C., Dean, R. G., Penchev, V., & Verhagen, H. J. (2005). Environmentally Friendly Coastal Protection: Proceedings of the NATO Advanced Research Workshop on Environmentally Friendly Coastal Protection Structures Varna, Bulgaria 25–27 May 2004. Springer Netherlands.
Παραπομπή σε μορφή Chicago (17η εκδ.)SpringerLink (Online service), Claus Zimmermann, Robert G. Dean, Valeri Penchev, και Henk Jan Verhagen. Environmentally Friendly Coastal Protection: Proceedings of the NATO Advanced Research Workshop on Environmentally Friendly Coastal Protection Structures Varna, Bulgaria 25–27 May 2004. Dordrecht: Springer Netherlands, 2005.
Παραπομπή σε μορφή MLA (8th εκδ.)SpringerLink (Online service), et al. Environmentally Friendly Coastal Protection: Proceedings of the NATO Advanced Research Workshop on Environmentally Friendly Coastal Protection Structures Varna, Bulgaria 25–27 May 2004. Springer Netherlands, 2005.
