Harahap, Muh Burhanudin, Maria Veronika Roesminingsih, and Mudjito Mudjito. “Concept of Human Resources Development to Improve Teacher Performance: Multi-Case Study”. Studies in Learning and Teaching 1, no. 3 (December 28, 2020): 140-150. Accessed August 16, 2022. https://scie-journal.com/index.php/SiLeT/article/view/52.