Setiyawati, Enik, Fitria Wulandari, Moch. Bahak Udin By Arifin, Hendra Erik Rudyanto, and Ika Santia. 2018. “Using Online Learning Systems to Measure Students’ Basic Teaching Skill”. International Journal of Engineering & Technology 7 (4.7): 463-67. https://doi.org/10.14419/ijet.v7i4.7.27360.