JPFA E. Introduction, Author Guidelines, and Table of Contents JPFA Vol 8 No 1 June 2018. J. Penelit. Fis. Apl. [Internet]. 2018 Jun. 30 [cited 2025 Jun. 9];8(1):ii-vi. Available from: https://journal.unesa.ac.id/index.php/jpfa/article/view/2950