“Application of Betty Neuman Systems Model in the Pre-Operative Care of a Patient Undergoing Percutaneous Coronary Intervention (PCI): A Case Study”. Pakistan Journal of Medical & Cardiological Review 5, no. 1 (March 16, 2026): 3839–3848. Accessed September 1, 2026. https://pakjmcr.com/index.php/1/article/view/1609.