Allen, I. (1987). Education in sex and personal relationships. Policy Studies Institute.
Chicago-viite (17. p.)Allen, Isobel. Education in Sex and Personal Relationships. London: Policy Studies Institute, 1987.
MLA-viite (9. p.)Allen, Isobel. Education in Sex and Personal Relationships. Policy Studies Institute, 1987.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.