Gaya APA

O’Connor, K, J., Ammen, S. (2013). Play therapy : treatment planning and interventions : the ecosystemic model and workbook (2nd ed.). Oxford: Academic Press.

Gaya MLA

O’Connor, Kevin, John., Ammen, Sue. "Play therapy : treatment planning and interventions : the ecosystemic model and workbook". 2nd ed. Oxford: Academic Press, 2013. Electronic Resource.