World Health Organization. (1998). Health workers manual on family planning options (Second.). World Health Organization.
Chicago-referens (17:e uppl.)World Health Organization. Health Workers Manual on Family Planning Options. Second. Geneva: World Health Organization, 1998.
MLA-referens (8:e uppl.)World Health Organization. Health Workers Manual on Family Planning Options. Second. World Health Organization, 1998.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.