Não informado. (1963). Studies in Family Planning. Population Council.
Chicago-viite (17. p.)Não informado. Studies in Family Planning. New York: Population Council, 1963.
MLA-viite (8. p.)Não informado. Studies in Family Planning. Population Council, 1963.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.