I. Yani and A. D. Hasibuan, “Group Counseling with Behavior Contract to Reduce Student Phubbing: Konseling Kelompok dengan Behavior Contract untuk Mereduksi Perilaku Phubbing Siswa”, ijins, vol. 26, no. 4, p. 10.21070/ijins.v26i4.1701, Sep. 2025.