Susanto PC, Suryawan RF. OPTIMALISASI DAN KONTRIBUSI USAHA TRAVEL AGENT KEPADA MASKAPAI PENERBANGAN DI MASA PANDEMI COVID-19. premium [Internet]. 2021Jun.28 [cited 2024Apr.29];8(1):46 -51. Available from: https://ejournal.stma-trisakti.ac.id/index.php/premium/article/view/14