Hanna, S. L. (1991). Person to person: Positive relationships don't just happen. Prentice-Hall.
Chicago-referens (17:e uppl.)Hanna, Sharon L. Person to Person: Positive Relationships Don't Just Happen. Englewood Cliffs NJ: Prentice-Hall, 1991.
MLA-referens (9:e uppl.)Hanna, Sharon L. Person to Person: Positive Relationships Don't Just Happen. Prentice-Hall, 1991.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.