Candra, D.A., Anggriawan, R., Hana, C. and Fajri, M.L.N. 2026. Phytogenic–probiotic supplementation enhances growth and economic efficiency in commercial closed-house broiler production systems: Phytogenic–probiotic supplementation in broiler chicken. Letters in Animal Biology. 6, 2 (Jul. 2026), 79–88. DOI:https://doi.org/10.62310/liab.v6i2.378.