Abdullah, Mohd Hafizuddin-Syah Bangun, et al. “Independent Smallholders’ Perceptions towards MSPO Certification in Sabah, Malaysia”. Jurnal Manajemen Hutan Tropika, vol. 28, no. 3, Nov. 2022, p. 241, https://doi.org/10.7226/jtfm.28.3.241.