Aritonang, T. R., Siantar, R. L., & Simanjuntak, F. M. (2021). The Effectiveness of Steeping Rosella (Hibiscus Sabdariffa) Against Hypertension in the Elderly. International Journal of Science and Society, 3(1), 412-419. https://doi.org/10.54783/ijsoc.v3i1.308