Firmanudin, M., Sudradjat, and V. C. Mulyandani. “Pengaruh Intellectual Capital Terhadap Produktivitas Kerja Pegawai”. Indonesian Accounting Research Journal, Vol. 1, no. 2, Feb. 2021, pp. 307-16, https://jurnal.polban.ac.id/ojs-3.1.2/iarj/article/view/2450.