Saad, N., and S. Sankaran. “Kelestarian Pembangunan Profesionalisme Guru Dalam Pembelajaran Sepanjang Hayat (Sustainability of Teacher Professional Development in Lifelong Learning)”. Jurnal Pembangunan Sosial, vol. 22, Dec. 2019, pp. 11-22, doi:10.32890/jps.22.2019.12678.