O Sizar؛ S Khare؛ A Goyal؛ P Bansal؛ A Givler (جنوری 2021)۔ "Vitamin D Deficiency"۔ PMID:30335299{{حوالہ رسالہ}}: الاستشهاد بدورية محكمة يطلب |دورية محكمة= (معاونت)
"Office of Dietary Supplements - Vitamin D". ods.od.nih.gov (بزبان انگریزی). U.S. Department of Health & Human Services: National Institutes of Health. 26 Mar 2021. Archived from the original on 2021-04-09. Retrieved 2021-04-09.
"Office of Dietary Supplements - Vitamin D". ods.od.nih.gov (بزبان انگریزی). U.S. Department of Health & Human Services: National Institutes of Health. 26 Mar 2021. Archived from the original on 2021-04-09. Retrieved 2021-04-09.