APA
Koivusalo H., Varis O., Somlyódy L. & International Institute for Applied Systems Analysis. (1992). Water quality of Nitra river, Slovakia: analysis of organic material pollution. Laxenburg: International Institute for Applied Systems Analysis.
Chicago
Koivusalo Harri, Varis Olli, Somlyódy László and International Institute for Applied Systems Analysis. 1992. Water quality of Nitra river, Slovakia: analysis of organic material pollution. Laxenburg: International Institute for Applied Systems Analysis.
Harvard
Koivusalo H., Varis O., Somlyódy L. and International Institute for Applied Systems Analysis. (1992). Water quality of Nitra river, Slovakia: analysis of organic material pollution. Laxenburg: International Institute for Applied Systems Analysis.
MLA
Koivusalo Harri, Varis Olli, Somlyódy László and International Institute for Applied Systems Analysis. Water quality of Nitra river, Slovakia: analysis of organic material pollution. Laxenburg: International Institute for Applied Systems Analysis. 1992.