Sombatphutthakun, Areerat, Sirithon Sinpiang, and Suwakon Janta. “The Adsorption of Methylene Blue Dye Using Pineapple Peel Waste”. PKRU SciTech Journal 9, no. 1 (March 27, 2025): 1–12. accessed May 13, 2025. https://ph01.tci-thaijo.org/index.php/pkruscitech/article/view/257673.