Sihombing, Ericson, and Dorlan Naibaho. “Wibawa Guru Pendidikan Agama Kristen Terhadap Perkembangan Mental Peserta Didik: Studi Kasus UPT SMP 010 Parsingguran”. Indonesian Journal of Service 1, no. 1 (March 27, 2025): 47–60. Accessed May 25, 2026. https://indonesiastt.ac.id/journal/index.php/ijs/article/view/44.