Pane, Januaris, 		Pardede, Dewi, 		Br Munthe, Irawati, 		Sirait, Esra, 		Butar Butar, Juniarta, 		Panggabean, Putri, AND 		Siallagan, Theo.
" CALISTUNG TRAINING AND ENGLISH VOCABULARY IMPROVEMENT FOR SCHOOL CHILDREN IN SUKAJULU VILLAGE" <em>PKM Maju UDA</em> [Online], Volume 3 Number 3 (23 March 2023)