SudadiU., ImaduddinM. A., and IskandarI. “Phosphate Adsorption Characteristics of ‘nanoclay’ Separated from Indonesian Volcanic Tuffs”. Jurnal Pengelolaan Sumberdaya Alam Dan Lingkungan (Journal of Natural Resources and Environmental Management), Vol. 12, no. 4, Dec. 2022, pp. 740-8, doi:10.29244/jpsl.12.4.740-748.