Agnes Rambu B. Loti and Iona Lisa Ndakularak, “Efektivitas Model Pembelajaran Kooperatif Tipe Numbered Head Together (NHT) Terhadap Hasil Belajar Siswa Kelas XI SMA PGRI Waingapu: Penelitian”, JERKIN, vol. 4, no. 1, pp. 3336–3341, Aug. 2025.