Sudung Simatupang, Erbin Chandra, Natanael Saragih, Marisi Butarbutar, and E. Efendi, “PELATIHAN PENGEMBANGAN SUMBER DAYA MANUSIA BAGI TENAGA PENDIDIK EKKLESIA PRIVATE ENGLISH COURSE ”, J-ABDI, vol. 2, no. 5, pp. 4953–4960, Oct. 2022.