Winda Kustiawan, W. K.; Iskandar Mandika Sebayang; Aldino Firmansyah. INCREASING COMMUNITY PARTICIPATION THROUGH THE NEIGHBOURHOOD WATCH PROGRAMME TO PREVENT THEFT IN TANJUNG GUSTA SUB-DISTRICT, MEDAN HELVETIA DISTRICT: AN ACTION RESEARCH STUDY. j-ikhsan 2026, 5, 331-340.