O'Connor, K. J., & Ammen, S. (1997). Play therapy treatment planning and interventions: The ecosystemic model and workbook. Academic Press.
Chicago Style (17th ed.) CitationO'Connor, Kevin J., and Sue Ammen. Play Therapy Treatment Planning and Interventions: The Ecosystemic Model and Workbook. San Diego: Academic Press, 1997.
MLA (9th ed.) CitationO'Connor, Kevin J., and Sue Ammen. Play Therapy Treatment Planning and Interventions: The Ecosystemic Model and Workbook. Academic Press, 1997.
Warning: These citations may not always be 100% accurate.