JPFA E. Introduction, Author Guidlines, and Table of Contents JPFA Vol 10 No 1 June 2020. J. Penelit. Fis. Apl. [Internet]. 2020Jun.30 [cited 2024May22];10(1):ii-vi. Available from: https://journal.unesa.ac.id/index.php/jpfa/article/view/10764