Rahayu Surtiningtyas, Sri. “A Preliminary Study for Blended Learning Simulation Based Model on Aerodrome Flight Information Course”. International Journal of Engineering & Technology 7, no. 3.25 (August 14, 2018): 644–648. Accessed May 2, 2024. https://sciencepubco.com/index.php/ijet/article/view/17816.