Susilawati, Susilawati, et al. “Analysis of Validation Development Science Learning Tools Using Guided Inquiry Model Assisted by Real Media to Improve the Understanding Concepts and Science Process Skills of Students”. Jurnal Penelitian Pendidikan IPA, vol. 7, no. 1, Dec. 2020, pp. 41-44, doi:10.29303/jppipa.v7i1.473.