Yuhastina, Yuhastina, et al. “Sociology Teachers’ Opportunities and Challenges in Facing ‘Merdeka Belajar’ Curriculum in the Fourth Industrial Revolution (Industry 4.0)”. Society, vol. 8, no. 2, Dec. 2020, pp. 732-53, https://doi.org/10.33019/society.v8i2.234.