Afifah, N., N. D. Putri, Maheta Anisa Haqqu, and B. Setiaji. “Feasibility Analysis of Animation Video Learning Media Based Powtoon on Lagrange Mechanics”. Impulse: Journal of Research and Innovation in Physics Education, vol. 1, no. 2, Dec. 2021, pp. 103-1, doi:10.14421/impulse.2021.12-06.