Setiana, Aileen Christabella. “The Effectiveness of Using Paid Advertisements on Instagram to Increase Sales at Grooveart Music Course”. Review of Management, Accounting, and Business Studies 2, no. 2 (December 31, 2021): 82-90. Accessed July 3, 2024. https://journal.undiknas.ac.id/index.php/revenue/article/view/3765.