SpringerLink (Online service), Andreasen, T., Christiansen, H., & Larsen, H. L. (1998). Flexible Query Answering Systems: Third International Conference, FQAS'98, Roskilde, Denmark, May 13-15, 1998, Proceedings (1st ed. 1998.). Springer Berlin Heidelberg : Imprint: Springer. https://doi.org/10.1007/BFb0055986
Παραπομπή σε μορφή Chicago (17η εκδ.)SpringerLink (Online service), Troels Andreasen, Henning Christiansen, και Henrik L. Larsen. Flexible Query Answering Systems: Third International Conference, FQAS'98, Roskilde, Denmark, May 13-15, 1998, Proceedings. 1st ed. 1998. Berlin, Heidelberg: Springer Berlin Heidelberg : Imprint: Springer, 1998. https://doi.org/10.1007/BFb0055986.
Παραπομπή σε μορφή MLA (8th εκδ.)SpringerLink (Online service), et al. Flexible Query Answering Systems: Third International Conference, FQAS'98, Roskilde, Denmark, May 13-15, 1998, Proceedings. 1st ed. 1998. Springer Berlin Heidelberg : Imprint: Springer, 1998. https://doi.org/10.1007/BFb0055986.
