JPFA E. Introduction, Author Guidlines, and Table of Contents JPFA Vol 10 No 1 June 2020. J. Penelit. Fis. Apl. [Internet]. 2020 Jun. 30 [cited 2025 Feb. 9];10(1):ii-vi. Available from: https://journal.unesa.ac.id/index.php/jpfa/article/view/10764