Sariyati, Feni, Arum Ratnaningsih, and Rintis Rizkia Pangestika. “Development of Calistung E-Book With Flora and Fauna Character in Indonesian and Mathematics Learning Grade I Muhammadiyah Purworejo Elementary School”. Jurnal Pendidikan Amartha 1, no. 2 (January 1, 2023): 38–45. Accessed August 31, 2026. https://rayyanjurnal.com/index.php/jpa/article/view/87.