Triyanto, Triyanto, Lusiana Lusiana, and Yudhi Purnama. “Analisis Profesional Personal Trainer Di Fitness Center Hotel Kota Semarang Tengah”. Journal of Education and Sport Science 2, no. 1 (July 19, 2021). Accessed December 27, 2025. https://publikasiilmiah.unwahas.ac.id/JESS/article/view/4819.