Bowlby, John (1988). A secure base: clinical applications of attachment theory. London: Routledge. pp. 107–109. ISBN978-1-135-07085-4. OCLC980347693.
Bowlby, John (1988). A secure base: clinical applications of attachment theory. London: Routledge. pp. 109–110. ISBN978-1-135-07085-4. OCLC980347693.
Young families under stress : outcomes and costs of Home-Start support. Colette McAuley. York: Joseph Rowntree Foundation. 2004. ISBN1-85935-217-0. OCLC70656661.{{cite book}}: CS1 maint: others (link)