"Pre-conception Folic Acid and Multivitamin Supplementation for the Primary and Secondary Prevention of Neural Tube Defects and Other Folic Acid-Sensitive Congenital Anomalies". Journal of Obstetrics and Gynaecology Canada. 37 (6): 534-52. June 2015. doi:10.1016/s1701-2163(15)30230-9. ISSN1701-2163. PMID26334606.
"Vitamins and Minerals". National Institute on Aging (İngilizce). 1 Ağustos 2017 tarihinde kaynağından arşivlendi. Erişim tarihi: 12 Mayıs 2020.
ncbi.nlm.nih.gov
"Pre-conception Folic Acid and Multivitamin Supplementation for the Primary and Secondary Prevention of Neural Tube Defects and Other Folic Acid-Sensitive Congenital Anomalies". Journal of Obstetrics and Gynaecology Canada. 37 (6): 534-52. June 2015. doi:10.1016/s1701-2163(15)30230-9. ISSN1701-2163. PMID26334606.
web.archive.org
"Listing of vitamins". Harvard Health. 9 Haziran 2009. 16 Şubat 2015 tarihinde kaynağından arşivlendi. Erişim tarihi: 12 Mayıs 2020.
"Vitamins and Minerals". National Institute on Aging (İngilizce). 1 Ağustos 2017 tarihinde kaynağından arşivlendi. Erişim tarihi: 12 Mayıs 2020.
"Pre-conception Folic Acid and Multivitamin Supplementation for the Primary and Secondary Prevention of Neural Tube Defects and Other Folic Acid-Sensitive Congenital Anomalies". Journal of Obstetrics and Gynaecology Canada. 37 (6): 534-52. June 2015. doi:10.1016/s1701-2163(15)30230-9. ISSN1701-2163. PMID26334606.