Latiana, L., S. Samsudi, S. Sugiyo, and S. Slameto. “Developing Collaboration-Based Supervision Model to Enhance the Professionalism of Early Childhood Education Teachers”. The Journal of Educational Development, Vol. 6, no. 1, Jan. 2018, pp. 132-43, doi:10.15294/jed.v6i1.20764.