Não informado. (1969). Research in Reproduction. International Planned Parenthood Federation.
Chicago-viite (17. p.)Não informado. Research in Reproduction. London: International Planned Parenthood Federation, 1969.
MLA-viite (8. p.)Não informado. Research in Reproduction. International Planned Parenthood Federation, 1969.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.