Simatupang, Nofi Reski Yani, Ermi Girsang, and Sri Lestari Ramadhani. “Evaluation of Referral System Barriers at Dr. Pirngadi Hospital, Medan City: Qualitative Study of In-Depth Interviews”. Proceedings International Conference on Lifestyle Diseases and Natural Medicine (ICOLIFEMED) 2, no. 1 (April 7, 2026): 235–240. Accessed June 13, 2026. https://jurnal.unprimdn.ac.id/index.php/icolifemed/article/view/7993.