HL, Nur Ihsan, Nasruddin Nasruddin, Andri Estining Sejati, and Agus Sugiarto. “Developing Teaching Material of Research Methodology and Learning With 4D Model in Facilitating Learning During the Covid-19 Pandemic to Improve Critical Thinking Skill”. Jurnal Kependidikan: Jurnal Hasil Penelitian dan Kajian Kepustakaan di Bidang Pendidikan, Pengajaran dan Pembelajaran 9, no. 2 (May 31, 2023): 541–554. Accessed August 16, 2025. https://e-journal3.undikma.ac.id/index.php/jurnalkependidikan/article/view/7110.