Bugis, M., N. Hidayati, and D. Kresnadipayana. “Utilization of Grapefruit (Citrus Maxima Merr) Extract and Powder for Reducing Levels Heavy Metals Krom(VI) and Cadmium(II) on Artifisial Liquid Waste”. Biomedika, Vol. 12, no. 2, Oct. 2019, pp. 251-8, doi:https://doi.org/10.31001/biomedika.v12i2.618.