Dr. Timothy H. Brubaker. Family Relationships in Later Life. SAGE.
Chicago-viite (17. p.)Dr. Timothy H. Brubaker. Family Relationships in Later Life. SAGE.
MLA-viite (8. p.)Dr. Timothy H. Brubaker. Family Relationships in Later Life. SAGE.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.