Petrashchuk, Olena. “TEST OF ENGLISH FOR AVIATION PERSONNEL TO MEET ICAO LANGUAGE PROFICIENCY REQUIREMENTS”. Proceedings of National Aviation University 52, no. 3 (October 19, 2012): 160–163. Accessed December 21, 2024. https://jrnl.nau.edu.ua/index.php/visnik/article/view/2370.