O'Connor, K. J. (1991). The play therapy primer: An integration of theories and techniques. Wiley.
Chicago-viite (17. p.)O'Connor, Kevin J. The Play Therapy Primer: An Integration of Theories and Techniques. New York: Wiley, 1991.
MLA-viite (8. p.)O'Connor, Kevin J. The Play Therapy Primer: An Integration of Theories and Techniques. Wiley, 1991.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.