Abdulkarim, B. ., Yacob, M. R. ., Abdullah, A. M. ., & Radam, A. . (2016). Households Preferences and Willingness to Pay for Watershed Services Attributes in North Selangor Peat Swamp Forest Malaysia. Asian Journal of Economic Modelling, 5(1), 98–109. https://doi.org/10.18488/journal.8/2017.5.1/8.1.98.109