Rucita Ayu Wijaksana; Ani Nur Aeni; Dety Amelia Karlina. Development of EKSIS (ebook Ekosistem) to Introduce the Ecosystem Concept in Class 3 Elementary School. JPFKIP 2024, 13 (5), 224-233. https://doi.org/10.33578/jpfkip-v13i5.p224-233.