Olivia Azhar, Herida Panji. “Developing Airport Vocabulary Learning Materials for Air Transport Management Students”. Journal of Nusantara Education 2, no. 1 (August 30, 2022): 22–29. Accessed April 26, 2024. https://journal.unu-jogja.ac.id/fip/index.php/JONED/article/view/41.