Campbell, O. (1999). Social science methods for research on reproductive health. World Health Organization.
Chicago-viite (17. p.)Campbell, Oona. Social Science Methods for Research on Reproductive Health. Geneva: World Health Organization, 1999.
MLA-viite (9. p.)Campbell, Oona. Social Science Methods for Research on Reproductive Health. World Health Organization, 1999.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.