Alfi, A. S., L.R. Retno Susanti, and Sardianto Markos Siahaan. “Development of Multimedia Interactive Learning of Hydrosphere Material for High School”. JTP - Jurnal Teknologi Pendidikan, Vol. 23, no. 1, June 2021, pp. 1-10, doi:10.21009/jtp.v23i1.18579.