Ahmed, S. U., & Gotoh, K. (2006). Cost-Benefit Analysis of Environmental Goods by Applying the Contingent Valuation Method: Some Japanese Case Studies. Springer Japan. https://doi.org/10.1007/4-431-28950-X

Ahmed, Sarwar Uddin, and Keinosuke Gotoh. Cost-Benefit Analysis of Environmental Goods by Applying the Contingent Valuation Method: Some Japanese Case Studies. Tokyo: Springer Japan, 2006. https://doi.org/10.1007/4-431-28950-X.

Ahmed, Sarwar Uddin, and Keinosuke Gotoh. Cost-Benefit Analysis of Environmental Goods by Applying the Contingent Valuation Method: Some Japanese Case Studies. Springer Japan, 2006. https://doi.org/10.1007/4-431-28950-X.