Nurman, Amril, and Edi Harapan. “Marketing Mix Implementation on Products, Prices, Places, Promotions In Marketing of Education Services”. Jurnal Pendidikan Tambusai 5, no. 2 (August 29, 2021): 5211–5220. Accessed April 25, 2025. http://jptam.org/index.php/jptam/article/view/1804.