SpringerLink (Online service), Freksa, C., Nebel, B., Hegarty, M., & Barkowsky, T. (2014). Spatial Cognition IX: International Conference, Spatial Cognition 2014, Bremen, Germany, September 15-19, 2014. Proceedings. Springer International Publishing : Imprint: Springer.
Παραπομπή σε μορφή Chicago (17η εκδ.)SpringerLink (Online service), Christian Freksa, Bernhard Nebel, Mary Hegarty, και Thomas Barkowsky. Spatial Cognition IX: International Conference, Spatial Cognition 2014, Bremen, Germany, September 15-19, 2014. Proceedings. Cham: Springer International Publishing : Imprint: Springer, 2014.
Παραπομπή σε μορφή MLA (8th εκδ.)SpringerLink (Online service), et al. Spatial Cognition IX: International Conference, Spatial Cognition 2014, Bremen, Germany, September 15-19, 2014. Proceedings. Springer International Publishing : Imprint: Springer, 2014.
