Gavino, R. B., V. E. B. Camaso, and C. C. Tiw-an. “Assessment of Mechanization Level of Onion Production in Nueva Ecija”. CLSU International Journal of Science and Technology, vol. 4, no. 1, July 2020, pp. 81-98, https://ijst.clsu.edu.ph/index.php/ijst/article/view/v4n1_06.