“An Investigatory Project of Psidium Guajava and Sodium Chloride As Soap for Treating Acne and Exfoliating Skin: Vol.3, No.1D”. Ascendens Asia Singapore – Bestlink College of the Philippines Journal of Multidisciplinary Research 3, no. 1D (April 22, 2024). Accessed December 14, 2025. https://ojs.aaresearchindex.com/index.php/aasgbcpjmra/article/view/13461.