Prayogi, S. and Verawati, N.N.S.P. 2020. The Effectiveness of E-Learning Usage in Classroom Teaching to Promote Critical Thinking Ability. International Journal of Recent Contributions from Engineering, Science & IT (iJES). 8, 4 (Dec. 2020), pp. 61–68. DOI:https://doi.org/10.3991/ijes.v8i4.18023.