Qurratu'ain, Yona, et al. “Influence of Sociodemographic, Knowledge, and Behavior of DKI Jakarta People on Willingness To Pay for Disposable Mask During the Covid-19 Pandemic”. Jurnal Pengelolaan Sumberdaya Alam Dan Lingkungan (Journal of Natural Resources and Environmental Management), vol. 15, no. 1, Jan. 2025, p. 42, https://doi.org/10.29244/jpsl.15.1.42.