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 [Internet]. 2024 Oct. 10 [cited 2026 Oct. 6];13(5):224-33. Available from: https://primary.ejournal.unri.ac.id/index.php/JPFKIP/article/view/36