Purba, H., Simanjuntak, H. A., & Situmorang, R. (2020). Phytochemical screening of bunga rosella (Hibiscus sabdariffa L) and antimicrobial activity test. Jurnal Pendidikan Kimia, 12(2), 70–78. https://doi.org/10.24114/jpkim.v12i2.19398