DEA PRAVITA GUNAWAN; ENDANG MURTI; BAMBANG MARTIN BARU. STANDARD OPERATING PROCEDURE (SOP) FOR THE IMPLEMENTATION OF THE COLLECTION UNIT FUNCTION AT PT. KERETA API INDONESIA (PERSERO) DAOP 7 MADIUN: Standar Operasional Prosedur (SOP) Pelaksanaan Fungsi Unit Penagihan di PT. Kereta Api Indonesia (PERSERO) DAOP 7 Madiun. Santhet (Jurnal Sejarah Pendidikan Dan Humaniora), [S. l.], v. 10, n. 2, p. 686–692, 2026. DOI: 10.36526/santhet.v10i2.7738. Disponível em: https://ejournal.unibabwi.ac.id/index.php/santhet/article/view/7738. Acesso em: 4 may. 2026.