Zulkarnain, T. S. ., and I. F. . Tanjung. “STEM Based Ecosystem Module: An Effort to Improve Students’ Science Process Skill”. Jurnal Pendidikan Dan Pengajaran, vol. 56, no. 1, Apr. 2023, pp. 33-44, doi:10.23887/jpp.v56i1.59516.