Ardiana, Ellen Ira, Joko Suryono, Betty Gama, and Bono Setyo. “Utilization of Instagram @posaja_sragen for Marketing Communication to Promote PT Pos Indonesia Sragen Products”. Revenue Journal: Management and Entrepreneurship 2, no. 1 (March 15, 2024): 63–81. Accessed July 4, 2025. https://journal.assyfa.com/index.php/rjme/article/view/490.