Nur Sinta, Mawar, and Nugraheti Sismulyasih SB. “Development of a Pair Check Cooperative-Based Zig-Zag Book to Improve the Writing Skills of Elementary School Students”. Journal of Integrated Elementary Education 5, no. 1 (March 22, 2025): 237–253. Accessed March 31, 2025. https://journal.walisongo.ac.id/index.php/jieed/article/view/25448.