SpringerLink (Online service), Tepfenhart, W. M., & Cyre, W. (1999). Conceptual Structures: Standards and Practices: 7th International Conference on Conceptual Structures, ICCS'99, Blacksburg, VA, USA, July 12-15, 1999, Proceedings (1st ed. 1999.). Springer Berlin Heidelberg : Imprint: Springer. https://doi.org/10.1007/3-540-48659-3
Παραπομπή σε μορφή Chicago (17η εκδ.)SpringerLink (Online service), William M. Tepfenhart, και Walling Cyre. Conceptual Structures: Standards and Practices: 7th International Conference on Conceptual Structures, ICCS'99, Blacksburg, VA, USA, July 12-15, 1999, Proceedings. 1st ed. 1999. Berlin, Heidelberg: Springer Berlin Heidelberg : Imprint: Springer, 1999. https://doi.org/10.1007/3-540-48659-3.
Παραπομπή σε μορφή MLA (8th εκδ.)SpringerLink (Online service), et al. Conceptual Structures: Standards and Practices: 7th International Conference on Conceptual Structures, ICCS'99, Blacksburg, VA, USA, July 12-15, 1999, Proceedings. 1st ed. 1999. Springer Berlin Heidelberg : Imprint: Springer, 1999. https://doi.org/10.1007/3-540-48659-3.
