P. S. Tarisah and D. W. Silalahi, “Peran Guru Kristen dalam Mengembangkan Keterampilan Kolaboratif pada Pembelajaran Abad ke-21 Berdasarkan Filsafat Pendidikan Kristen [The Role of Christian Teachers in Developing Collaborative Skills in 21st Century Learning Based on the Philosophy of Christian Education]”, DILIGENTIA, vol. 6, no. 2, pp. 241–263, May 2024.