SpringerLink (Online service), Freksa, C., & Mark, D. M. (1999). Spatial Information Theory. Cognitive and Computational Foundations of Geographic Information Science: International Conference COSIT'99 Stade, Germany, August 25-29, 1999 Proceedings (1st ed. 1999.). Springer Berlin Heidelberg : Imprint: Springer. https://doi.org/10.1007/3-540-48384-5
Παραπομπή σε μορφή Chicago (17η εκδ.)SpringerLink (Online service), Christian Freksa, και David M. Mark. Spatial Information Theory. Cognitive and Computational Foundations of Geographic Information Science: International Conference COSIT'99 Stade, Germany, August 25-29, 1999 Proceedings. 1st ed. 1999. Berlin, Heidelberg: Springer Berlin Heidelberg : Imprint: Springer, 1999. https://doi.org/10.1007/3-540-48384-5.
Παραπομπή σε μορφή MLA (8th εκδ.)SpringerLink (Online service), et al. Spatial Information Theory. Cognitive and Computational Foundations of Geographic Information Science: International Conference COSIT'99 Stade, Germany, August 25-29, 1999 Proceedings. 1st ed. 1999. Springer Berlin Heidelberg : Imprint: Springer, 1999. https://doi.org/10.1007/3-540-48384-5.
