AYUMIATI, I., SAPUTRI, F.A. and MUCHTARIDI, M. 2021. SAMPLE PREPARATION AND BIOANALYSIS VALIDATION FOR NATURAL PRODUCT SAMPLE. International Journal of Applied Pharmaceutics. 13, 2 (Mar. 2021), 33–47. DOI:https://doi.org/10.22159/ijap.2021v13i2.39034.