Barbier, E. B., Acreman, M., & Knowler, D. (1997). Economic valuation of wetlands: A guide for policy makers and planners. Ramsar Convention Bureau.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBarbier, Edward B., Mike Acreman, और Duncan Knowler. Economic Valuation of Wetlands: A Guide for Policy Makers and Planners. Gland, Switzerland: Ramsar Convention Bureau, 1997.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBarbier, Edward B., et al. Economic Valuation of Wetlands: A Guide for Policy Makers and Planners. Ramsar Convention Bureau, 1997.
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