Damanik, N. K. S., D. Adinda, J. A. Silaban, and C. N. Br Sembiring. “Analysis of the Use of Standard and Non-Standard Indonesian in Formal And Informal Communication”. International Journal of Students Education, vol. 3, no. 1, Dec. 2024, pp. 441-4, https://journal.berpusi.co.id/index.php/IJoSE/article/view/1112.