Composite Hydrogel of Poly(vinyl alcohol) Loaded by Citrus hystrix Leaf Extract, Chitosan, and Sodium Alginate with In Vitro Antibacterial and Release Test oleh Kusjuriansah Kusjuriansah, Marathur Rodhiyah, Nabila Asy Syifa, Halida Rahmi Luthfianti, William Xaveriano Waresindo, Dian Ahmad Hapidin, Tri Suciati, Dhewa Edikresnha, Khairurrijal Khairurrijal