Dinda Sari, and Rezty Fauziah Novianty. “Evaluasi Hambatan Safety Management System (SMS) Pada Pengendalian Lalu Lintas Udara Di Perum LPPNPI Cabang Yogyakarta”. As-Syirkah: Islamic Economic & Financial Journal 4, no. 3 (October 5, 2025): 555 – 562. Accessed May 23, 2026. https://journal-ikadi.com/ojs/index.php/assyirkah/article/view/450.