Chamnan Sok, Kosal Thay, Sovantha Ros, Phyny Sin, Tonghor Hab, and Sarom Mok, “Focused Leadership Influencing the Development, Effectiveness and Sustainability of Professional Learning Communities: Evidence from TVET Institutions in Cambodia”, daengku j. hum. soc. sci. innov., vol. 6, no. 4, Jul. 2026.