Prolan D Dizon, Erica Jane Agustin, Sam Carlo Ladores, Rick Donald Manzon, and Lori Espinoza Pascual, “Application of DMAIC Methodology to Improve the Non-Technical Loss Reduction Process in Nueva Ecija II Electric Cooperative, Inc, Area 1”, IJPRSE, vol. 2, no. 5, pp. 28–33, May 2021.