Firlan, F., W. D. Taifur, and I. Indrawari. “Human Capital of School-Age Population in West Sumatera: Measurement and Determinant”. Jurnal Perspektif Pembiayaan Dan Pembangunan Daerah, vol. 7, no. 1, Aug. 2019, pp. 1 - 14, doi:10.22437/ppd.v7i1.6977.