Williams, A. F. (2007). Vitamin D in pregnancy: An old problem still to be solved? BMJ Group.
Chicago-stil citatWilliams, A F. Vitamin D in Pregnancy: An Old Problem Still to Be Solved? BMJ Group, 2007.
MLA-referensWilliams, A F. Vitamin D in Pregnancy: An Old Problem Still to Be Solved? BMJ Group, 2007.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.