Saleh, Aga Eppino, Tandiyo Rahayu, and Soekardi Soekardi. 2019. “The Motivation for Physical Activity at Night (A Case Study on Semarang Runners Community)”. Journal of Physical Education and Sports 8 (5), 117-21. https://journal.unnes.ac.id/sju/jpes/article/view/33835.