Soebagio, and R. Moh. Yogiartono. “Surface Hardness of Composite Resins After the Contact With Siwak Stem Infusion”. International Journal of Psychosocial Rehabilitation 24, no. 9 (November 30, 2020): 3603–3610. Accessed January 21, 2026. https://psychosocial.com/index.php/ijpr/article/view/9123.