Healthline. https://www.healthline.com/health/exercise-fitness/benefit-of-pull-up
Diakses pada 5 Maret 2020Livestrong. https://www.livestrong.com/article/90190-benefits-pullups/
Diakses pada 5 Maret 2020Verywell Fit. https://www.verywellfit.com/pullup-bar-exercises-for-upper-body-strength-3120735
Diakses pada 5 Maret 2020