R. Sepang, T. Ogie, and S. Wantasen, “Water Quality Analysis of Rice Irrigation in Kolongan Village, North Minahasa District: Kualitas Air Irigasi Persawahan Padi di Desa Kolongan Kabupaten Minahasa Utara”, jlhi, vol. 1, no. 1, pp. 45–50, Apr. 2026, doi: 10.57207/p11a8s34.