Não informado. (1952). International planned parenthood news. International Planned Parenthood Federation.
Chicago-referens (17:e uppl.)Não informado. International Planned Parenthood News. London: International Planned Parenthood Federation, 1952.
MLA-referens (8:e uppl.)Não informado. International Planned Parenthood News. International Planned Parenthood Federation, 1952.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.