1. Reflective process in play therapy: A practical model for supervising counseling students;Allen;Education,2007
2. Association for Play Therapy 2014 Credentialing Guide: Registered play therapist (RPT) and supervisor (RPT-S ) http://c.ymcdn.com/sites/www.a4pt.org/resource/resmgr/RPT_and_RPT-S_Credentials/RPTS_Guide.pdf