Yarmi G, Suntari Y, Usman H, Yesi Y. Need Analysis of Mobile Learning Based on Problem Based Learning for Elementary School Student. JTP [Internet]. 2024 Aug. 31 [cited 2024 Nov. 2];26(2):507-16. Available from: https://journal.unj.ac.id/unj/index.php/jtp/article/view/47170