Mardiah, M., R. N. Hasanah, N. Novidahlia, and A. Z. Hasan. “OPTIMIZATION CONDITION EXTRACTION USED ENZYME WITH RESPONSE SURFACE METHODOLOGY TO EXTRACT ROSELLE PETALS (Hibiscus Sabdariffa L.)”. Jurnal Pertanian, vol. 9, no. 2, Jan. 2019, doi:10.30997/jp.v9i2.1477.