Sihotang, F.N. 2025. THE INFLUENCE OF E-PURCHASING AND GOOD GOVERNANCE ON URBAN AND REGIONAL PLANNING QUALITY AT THE REGIONAL SECRETARIAT OF SIMALUNGUN REGENCY. Mimbar Administrasi Mandiri. 21, 2 (Sep. 2025), 108–123. DOI:https://doi.org/10.37949/mimbar212242.