“EXTRACT OF GAMBIR BY PRODUCT AND FLORA ACTIVE CARBON AS ANTI BACTERIAL ACTIVITY TOWARD Bacillus subtilis”, STAP, vol. 5, pp. 404–407, May 2018, Accessed: Oct. 28, 2025. [Online]. Available: https://jnp.fapet.unsoed.ac.id/index.php/psv/article/view/502