Prasetyo, A., Suyahmo, S. and Handoyo, E. 2017. Student’s Establishment of Character and Social Behavior Through Langit Biru Program at SMP Negeri 3 Tuban. JESS (Journal of Educational Social Studies). 6, 2 (Dec. 2017), 125-134. DOI:https://doi.org/10.15294/jess.v6i2.15905.