Anom W, K, et al. “The Effect of STEM Approach E-Module -Topic of Free-Range Chicken Eggs Productivity on Student Learning Outcomes in Entrepreneurship Courses in the Era of the Industrial Revolution 4.0”. Jurnal Pendidikan Kimia, vol. 13, no. 3, Dec. 2021, pp. 261-8, doi:10.24114/jpkim.v13i3.29931.