Sumarni, S. et al. 2022. Comparison Analysis of Junior High School Science Textbooks in Indonesia and Singapore View from Nature of Science (NoS) Aspects. Jurnal Penelitian Pendidikan IPA. 8, 4 (Oct. 2022), 1707–1713. DOI:https://doi.org/10.29303/jppipa.v8i4.1638.