Dwiana, N., and A. Kristianto. “Effect of Fly Ash Use on Compressive Strength and Water Absorption of Paving Block”. Jurnal Indonesia Sosial Teknologi, vol. 5, no. 12, Dec. 2024, pp. 6146-58, https://jist.publikasiindonesia.id/index.php/jist/article/view/8854.