Napitupulu, Fenty. “The Improving of Students Ability In Writing Research Background Of Classroom Action Research Proposal by Using Scientific Approach ”. Visi Sosial Humaniora 2, no. 1 (June 28, 2021): 1-16. Accessed November 24, 2024. https://ejournal.uhn.ac.id/index.php/humaniora/article/view/321.