MAULIDYA, V., A. N. HASANAH, L. RIJAI, and M. MUCHTARIDI. “EXTRACTION AND CHARACTERIZATION OF BLACK BETEL LEAF (PIPER ACRE BLUME.) ESSENTIAL OILS FROM EAST KALIMANTAN”. International Journal of Applied Pharmaceutics, vol. 14, no. 4, Nov. 2022, pp. 38-44, doi:10.22159/ijap.2022.v14s4.OP02.