Sumandya IW, Widana IW. Reconstruction of Vocational-Based Mathematics Teaching Materials using a Smartphone. J. Educ. Technol. [Internet]. 2022 Mar. 1 [cited 2024 Nov. 29];6(1):133-9. Available from: https://ejournal.undiksha.ac.id/index.php/JET/article/view/42833