Multidisciplinary Conference on Sinkholes and the Environmental Impacts of Karst & Beck, B. F. (1989). Engineering and environmental impacts of sinkholes and karst: Proceedings of the third multidisciplinary conference on sinkholes and the engineering and environmental impacts of karst, St. Petersburg beach, Florida, 2-4 October 1989. A. A. Balkema.
Παραπομπή σε μορφή Chicago (17η εκδ.)Multidisciplinary Conference on Sinkholes and the Environmental Impacts of Karst και Barry F. Beck. Engineering and Environmental Impacts of Sinkholes and Karst: Proceedings of the Third Multidisciplinary Conference on Sinkholes and the Engineering and Environmental Impacts of Karst, St. Petersburg Beach, Florida, 2-4 October 1989. Rotterdam: A. A. Balkema, 1989.
Παραπομπή σε μορφή MLA (9th εκδ.)Multidisciplinary Conference on Sinkholes and the Environmental Impacts of Karst και Barry F. Beck. Engineering and Environmental Impacts of Sinkholes and Karst: Proceedings of the Third Multidisciplinary Conference on Sinkholes and the Engineering and Environmental Impacts of Karst, St. Petersburg Beach, Florida, 2-4 October 1989. A. A. Balkema, 1989.