Muhammad Waqas, Muqaddas Rehman, Abdul Rehman. The Barriers and Challenges Faced by Private Sector Higher Education Institutions (HEIs) in Promoting Sustainable Development: A Qualitative Inquiry in Pakistan . PJE [Internet]. 2023 May 22 [cited 2025 Oct. 28];36(1). Available from: https://ojs.aiou.edu.pk/index.php/pje/article/view/999