S. S. Yolanda, P. T. Hardani, and A. S. Sinulingga, “Validasi Metode Penetapan Kadar Alkaloid pada Ekstrak Etanol Daun Asam Jawa (Tamarindus indica L.) Secara Spektrofotometri UV-Vis: Validation of the Method of Determining Alkaloid Levels in Tamarind Leaf Ethanol Extract (Tamarindus indica L.) UV-Vis Spectrophotometry”, J. Sains Kes., vol. 6, no. 4, pp. 524–534, Aug. 2024.