Guillermo, Allan Q., Manuel A. Bajet, Jr., and Dominador F. Tolentino. “Effectiveness of the Two-in-One Device; Ignition Coil and Spark Plug Testing Instrument”. Jɫ̳ Multidisciplinary ɫ̳ 20, no. 1 (March 4, 2015): 83–103. Accessed June 8, 2025. /index.php/jpair/article/view/320.