Bakri, Samsul, et al. “Effects of Characteristics and Perceptions of Collectors of Non-Timber Forest Products to Be Members of the Partnership Program: A Case Study at Bukit Barisan Selatan National Park, Indonesia”. Jurnal Manajemen Hutan Tropika, vol. 29, no. 2, Aug. 2023, p. 109, https://doi.org/10.7226/jtfm.29.2.109.