Wahyuningsih A, Nurdyansyah N. Time Unit Interactive Ebook to Improve Logical Thinking Skills for Grade 2 Elementary School Students. jims [Internet]. 2023Feb.27 [cited 2024Nov.23];40:10.21070/jims.v4i0.1547. Available from: https://jims.umsida.ac.id/index.php/jims/article/view/1547