Rohmah, Fitriya, Suwito Eko Pramono, and Amin Yusuf. “Problem Based Learning Assisted by Mobile Learning to Improve Conceptual Understanding of Primary School Students”. Educational Management 9, no. 1 (January 30, 2020): 51-58. Accessed November 22, 2024. https://journal.unnes.ac.id/sju/eduman/article/view/37145.