S. Hassan, A. Shafiq, K. Firdaus, and J. J, “Education supply chain: A case study of input-process-output of high technical vocational education and training (HTVET)”, IJET, vol. 7, no. 2.29, pp. 60–61, May 2018, doi: 10.14419/ijet.v7i2.29.13129.