Rahardjanto, Abdulkadir, et al. “Bioindicators for Forest Area Condition: A Systematic Literature Review”. Jurnal Penelitian Dan Pengkajian Ilmu Pendidikan: E-Saintika, vol. 8, no. 1, Mar. 2024, pp. 138-64, https://doi.org/10.36312/esaintika.v8i1.1793.