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Diakses pada 31 Desember 2020Harvard Health. https://www.health.harvard.edu/staying-healthy/does-exercising-at-night-affect-sleep
Diakses pada 31 Desember 2020WebMD. https://www.webmd.com/sleep-disorders/news/20190225/evening-exercise-wont-wreck-your-sleep
Diakses pada 31 Desember 2020Very Well Fit. https://www.verywellfit.com/dos-and-donts-for-the-midnight-exerciser-1229781
Diakses pada 31 Desember 2020