Setiawan, A., Sariyatun, S. and Ardianto, D.T. 2018. The Innovation of Democratic Education: The Development of Learning Approach Based on the Sutan Syahrir’ Thought to Strengthen Students’ Democratic Attitude. Yupa: Historical Studies Journal. 2, 2 (Dec. 2018), 105-114. DOI:https://doi.org/10.30872/yupa.v2i2.121.