Niku EM, Wiyono BB, Wiyono BB, Nurul Ulfatin, Maisyaaroh. Quality Assurance in the Open University Service Online Learning Tutorial . JTP [Internet]. 2023 Dec. 31 [cited 2024 Nov. 22];25(3):610-8. Available from: https://journal.unj.ac.id/unj/index.php/jtp/article/view/45724