Iriyani, Sisca Yuni, Eko Darmanto, and Santoso. “Development of Electronic Teaching Material Based on Professional Flip Pdf to Improve Student Learning Outcomes”. Uniglobal Journal of Social Sciences and Humanities 1, no. 2 (September 30, 2022): 49–53. Accessed July 1, 2025. https://www.ujssh.com/index.php/ujssh/article/view/34.