Rodiah, S., R. Aprilia, and N. Ariesta. “Utilization Waste Materials to Synthesize Nano Al2O3-CaO Photocatalyst Using Infused Red Guava Leaves (Psidium Guajava L.)”. Al-Kimia, Vol. 10, no. 2, Dec. 2022, doi:10.24252/al-kimia.v10i2.33481.