Suwandi, S, A Yunus, and L E Rahmawati. “The Effectiveness of Ecological Intelligence-Based Indonesian Language Textbooks on the Environmentally Friendly Behaviors of State Junior High School Students in Surakarta”. KnE Social Sciences 3, no. 9 (July 26, 2018): 261–267. Accessed May 16, 2024. https://knepublishing.com/index.php/KnE-Social/article/view/2687.