Ari Antonius Sibarani; Debby Yohanna; Gani Gemilang; Kharisda Novtri Gratia Gulo; Miftahul Jannah Rahmatus Sani Simatupang; Dito Aditia Darma Nst. PROFESSIONAL ETHICS OF CIVIL SERVANTS AS PUBLIC SERVANTS CASE STUDY OF ONE-DOOR INTEGRATED SERVICES AT THE MANDAILING NATAL DISTRICT PROSECUTOR’S OFFICE BRANCH IN NATAL. IHERT 2026, 7, 331-335.