Purwanto. “APPLICATION OF MODEL-BASED LEARNING PROBLEMS IN 2013 ON THE SUBJECT CURRICULUM PANCASILA AND CITIZENSHIP EDUCATION AS AN EFFORT TO FORM A DEMOCRATIC ATTITUDE OF STUDENTS (Study at SMAN 1 BILATO)”. International Journal of Innovations in Engineering Research and Technology, vol. 8, no. 05, May 2021, pp. 176-84, https://repo.ijiert.org/index.php/ijiert/article/view/2541.