https://dispendik.situbondokab.go.id/berita/ https://vta.kemenhub.go.id/assets/
Mohadi, Risfidian, Hidayati, Nurlisa, Saputra, Adi, AND Lesbani, Aldes. " KAJIAN INTERAKSI ION Co2+ DENGANSELULOSA DARI SERBUK GERGAJIKAYU" CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) [Online], (13 November 2013)