Arnadi, Arnadi, Hifza Hifza, and Dedi. S. “Improving the Quality of Education through Technical Proficiency”. International journal of social sciences and humanities 4, no. 3 (October 8, 2020): 68-74. Accessed December 4, 2021. https://sciencescholar.us/journal/index.php/ijssh/article/view/456.