Rohman, M.H. et al. 2022. A Study of Sound Materials of Water Hyacinth (Eichhornia Crassipes) as Alternative STEAM Integrated Project-Based Learning Model (PjBL). Jurnal Penelitian & Pengembangan Pendidikan Fisika. 8, 1 (Jun. 2022), 11–22. DOI:https://doi.org/10.21009/1.08102.