Healthline
https://www.healthline.com/health/vitamin-d-and-joint-pain
Diakses 1 Agustus 2020Medical News Today
https://www.medicalnewstoday.com/articles/265748
Diakses 1 Agustus 2020Jointflex
https://www.jointflex.com/top-5-vitamins-healthy-joints/
Diakses 1 Agustus 2020Avogel UK
https://www.avogel.co.uk/health/muscles-joints/joint-pain/4-vitamins-and-minerals-for-healthy-joints/
Diakses 1 Agustus 2020Web MD
https://www.webmd.com/diet/supplement-guide-chondroitin
Diakses 1 Agustus 2020