APA-referens

Williams, A. F. (2007). Vitamin D in pregnancy: An old problem still to be solved? BMJ Group.

Chicago-stil citat

Williams, A F. Vitamin D in Pregnancy: An Old Problem Still to Be Solved? BMJ Group, 2007.

MLA-referens

Williams, A F. Vitamin D in Pregnancy: An Old Problem Still to Be Solved? BMJ Group, 2007.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.