Purba, W. ., Rukmana, D. ., Br.sitanggang, D. R. and Harefa, L. S. . (2021) “Impact of Online Learning in the Era Pandemic Using the Algorithm C 4.5 ”, Journal of Computer Networks, Architecture and High Performance Computing, 3(2), pp. 144-152. doi: 10.47709/cnahpc.v3i2.990.