Marwati, Dahlia Shofa, Nataria Wahyuning Subayani, and Nanang Khoirul Umam. “The Enhancement of The Ability to Calculating Multiplication in Elementary Schools Using Cogglak Media to Catch Up Post Covid-19”. Journal Universitas Muhammadiyah Gresik Engineering, Social Science, and Health International Conference (UMGESHIC) 2, no. 1 (January 11, 2023): 212–221. Accessed June 15, 2026. https://journal.umg.ac.id/index.php/umgeshic/article/view/5155.