Tampubolon, Y.M. and You She Melly Anne Dharasta 2024. 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. Langit Biru: Jurnal Ilmiah Aviasi. 17, 01 (Feb. 2024), 11-22. DOI:https://doi.org/10.54147/langitbiru.v17i01.973.