Tonido, Angel R. “Development and Acceptability of Low Cost Electro-Tech Trainer Board, Series-E09”. Asia Pacific Higher Education Research Journal (APHERJ) 1, no. 1 (November 20, 2014). Accessed May 1, 2024. https://po.pnuresearchportal.org/ejournal/index.php/apherj/article/view/85.