Sianturi ASR, Pradana SP. Improving student understanding through interactive e-books on environmental education in the biology education study program at pattimura university. 12waiheru [Internet]. 2025 Dec. 1 [cited 2026 May 19];11(2):138-45. Available from: https://journal.bdkambon-kemenag.id/index.php/12waiheru/article/view/97