Tinambunan, Anitha Paulina. “DIAGNOSA PENYAKIT DAN MODEL PERUBAHAN PADA UNIKA SANTO THOMAS MEDAN”. Jurnal Manajemen dan Bisnis 23, no. 1 (February 24, 2023): 208–224. Accessed July 22, 2024. https://ejournal.ust.ac.id/index.php/JIMB_ekonomi/article/view/2521.