Gede, Lalu Sri, et al. “The Effect Of Citric Acid (Acidum Citricum) Addition on Chromium (Cr) Levels in Wastewater”. Jurnal Analis Medika Biosains (JAMBS), vol. 13, no. 02, Nov. 2026, pp. 94-98, https://jambs.poltekkes-mataram.ac.id/index.php/home/article/view/623.