Miskad, U. A., A. A. Afniarty, T. T. Djimahit, G. Arsyadi, D. Achmad, M. H. Cangara, and D. Daud. “Programmed Death – Ligand 1 Expression in Malignancy of Thyroid Follicular Epithelial Cell Origin”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 48, no. 5, Nov. 2019, pp. 96-106, https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/10432.