Maulida, Wahda, and Saptina Retnawati. “The Effect of OBS Studio Learning Media on the Learning Achievement of Class X Economics Students at Mahmudiyyah Senior High School”. International Journal of Economics Education Research (IJEER), vol. 2, no. 1, July 2022, https://openjournal.unpam.ac.id/index.php/IJEER/article/view/22156.