H. Al Rashid, S. Supriyono, D. Moedzakir, and M. Efendi, “Evaluation of Teacher Professionalism Development Policy through Teachers Working Group program: Policy Assessment Study on Teacher Working Group of Cluster 1 and Cluster 4 in Blimbing, Malang, East Java, Indonesia”, JSS, vol. 6, no. 2, pp. 300–318, Apr. 2017.