Nurzanna, et al. “Interactive E-Book Design Assisted by Heyzine Flipbooks With the Learning Cycle Model: An Analysis of Product Effectiveness Reviewed from Students’ Critical Reasoning Ability”. Jurnal Elementaria Edukasia, vol. 8, no. 4, Dec. 2025, pp. 693-08, doi:10.31949/jee.v8i4.16291.