Fajriah, Nurul, Tuti Alawiyah, and Ikna Urwatul Wusko. “A Analysis of Anionic Surfactant Levels in Barito River Water Using Visible Spectrophotometry Method”. Journal Pharmaceutical Care and Sciences 1, no. 1 (November 5, 2020): 55–61. Accessed July 7, 2024. https://ejurnal.unism.ac.id/index.php/jpcs/article/view/22.