Hardiyansyah, Adi, et al. “Analysis of Validation Development of Learning Media of Microscope Digital Portable Auto Design to Improve Student Creativity and Problem-Solving Ability”. Jurnal Penelitian Pendidikan IPA, vol. 5, no. 2, July 2019, pp. 228-32, doi:10.29303/jppipa.v5i2.273.