Purnomo, Eddy, Joko Pekik Irianto, and Mansur Mansur. “Respons Molekuler Beta Endorphin Terhadap Variasi Intensitas Latihan Pada Atlet Sprint”. Jurnal Keolahragaan 8, no. 2 (November 24, 2020): 183–194. Accessed July 6, 2025. https://journal.uny.ac.id/index.php/jolahraga/article/view/33833.