Gelu, A., P. Marwoto, and M. P. Aji. “Remediation of Sound Wave Material Assisted by Sasando to Improve Understanding of Concepts and Analytical Thinking Abilities”. Journal of Innovative Science Education, Vol. 9, no. 2, Aug. 2020, pp. 203 -09, doi:10.15294/jise.v8i3.34805.