Mustadi, Ali, Suhardi Suhardi, Endah Sri Susilaningrum, Rohmatul Ummah, Maylina Purwatiningtyas, and Prabantara Esti Wijayanti. 2017. “Character Based Reflective Picture Storybook: Improving Student’s Social Self-Concept in Elementary School”. Jurnal Cakrawala Pendidikan 36 (3). https://doi.org/10.21831/cp.v36i3.15860.