Rohman, M. H., P. Marwoto, and S. Priatmoko. “A Study of Sound Materials of Water Hyacinth (Eichhornia Crassipes) As Alternative STEAM Integrated Project-Based Learning Model (PjBL)”. Jurnal Penelitian & Pengembangan Pendidikan Fisika, Vol. 8, no. 1, June 2022, pp. 11 -22, doi:10.21009/1.08102.