Bonoy, Diomel Gryle, Ray Allen Directo, Whynne Ordinario, Reeiz Cussler Yaco, Krizzalyn Mhae Aromin, Criscia Maren Morilla, and Girly Ann Aggalaw. 2026. “Psidium Guajava (Guava Leaves) Ash and Eggshell Powder As a Alternative for Cement”. International Journal of Sustainability and Advanced Integrated Research 2 (2): 1476-82. https://doi.org/10.65339/ijsair.V2.I2.343.