Tampubolon YM, You She Melly Anne Dharasta. The Influence of Implementation of Transformational and Democratic Leadership Styles On Job Loyalty of Employees at Airport Operation & Service Pt Angkasa Pura Aviasi Kualanamu International Airport Deli Serdang. JIA [Internet]. 2024 Feb. 29 [cited 2026 Jul. 23];17(01):11-22. Available from: https://journal.ppicurug.ac.id/index.php/jurnal-ilmiah-aviasi/article/view/973