International Commission of Hydrological Sciences, Kovar, K., & Soveri, J. (1994). Groundwater quality management: Proceedings of an international conference held at Tallinn, Estonia, from 6-9 September 1993 ; jointly organized by the International Commission of Hydrological Sciences, and the Institute of Ecology, Tallinn Estonia (17th ed.). International Association of Hydrological Sciences.
Chicago-referens (17:e uppl.)International Commission of Hydrological Sciences, K. Kovar, och J. Soveri. Groundwater Quality Management: Proceedings of an International Conference Held at Tallinn, Estonia, from 6-9 September 1993 ; Jointly Organized by the International Commission of Hydrological Sciences, and the Institute of Ecology, Tallinn Estonia. 17th ed. Oxfordshire, Eng: International Association of Hydrological Sciences, 1994.
MLA-referens (9:e uppl.)International Commission of Hydrological Sciences, et al. Groundwater Quality Management: Proceedings of an International Conference Held at Tallinn, Estonia, from 6-9 September 1993 ; Jointly Organized by the International Commission of Hydrological Sciences, and the Institute of Ecology, Tallinn Estonia. 17th ed. International Association of Hydrological Sciences, 1994.