Tabah Subekti, Andayani, Kundharu Saddhono, Budhi Setiawan. 2020. “The Effectiveness of the Use of Pancasila Based on Academic Writing Textbooks to the Attitude of Nationalism of Muhammadiyah University Students in Central Java, Indonesia”. International Journal of Advanced Science and Technology 29 (6s), 1215 -22. http://sersc.org/journals/index.php/IJAST/article/view/9255.