Hassan, Muhammad, y Ghulam Murtaza Maitlo. «Impact of Crew Training and Safety Management System on Operational Management in Aviation Industry of Pakistan». Amazonia Investiga 9, no. 30 (julio 7, 2020): 119–126. Accedido diciembre 19, 2025. https://mail.amazoniainvestiga.info/index.php/amazonia/article/view/1151.