BaniA., BenuF., and KottaH. “Willingness To Pay (WTP) for Environmental Services of Well Water Sources in Kupang City ”. Jurnal Pengelolaan Sumberdaya Alam Dan Lingkungan (Journal of Natural Resources and Environmental Management), Vol. 10, no. 2, May 2020, pp. 173-82, doi:10.29244/jpsl.10.2.173-182.