Putri FS. The Influence Of The Use Of E-Learning On Student Achievement Index In The Pandemic Period (Case Study On Students Of The Faculty Of Economics And Business, University Of Muhammadiyah Surakarta). proceeding [Internet]. 2021 Dec. 8 [cited 2024 May 6];:1121-9. Available from: https://repository.urecol.org/index.php/proceeding/article/view/1894