International Hydrological Programme, Nederlandse Centrale Organisatie voor Toegepast-Natuurwetenschappelijk Onderzoek. Commissie voor Hydrologisch Onderzoek, Committee of the European Network of Experimental and Representative Basins, Conference on Hydrological Research Basins and the Environment, Hooghart, J. C., Posthumus, C. W. S., & Warmerdam, P. M. M. (1990). Hydrological research basins and the environment: International conference, Wageningen, The Netherlands, 24-28 September, 1990. TNO.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रInternational Hydrological Programme, Nederlandse Centrale Organisatie voor Toegepast-Natuurwetenschappelijk Onderzoek. Commissie voor Hydrologisch Onderzoek, Committee of the European Network of Experimental and Representative Basins, Conference on Hydrological Research Basins and the Environment, J. C. Hooghart, C. W. S. Posthumus, और P. M. M. Warmerdam. Hydrological Research Basins and the Environment: International Conference, Wageningen, The Netherlands, 24-28 September, 1990. The Hague: TNO, 1990.
एमएलए (8वां संस्करण) प्रशस्ति पत्रInternational Hydrological Programme, et al. Hydrological Research Basins and the Environment: International Conference, Wageningen, The Netherlands, 24-28 September, 1990. TNO, 1990.