Lösungskunst Lehrbuch der kunst- und ressourcenorientierten Arbeit Eberhart Herbert Heftet / 2010 / Tysk
Principles and Practice of Expressive Arts Therapy Toward a Therapeutic Aesthetics Levine Stephen K. Heftet / 2004 / Engelsk
Presence and Process in Expressive Arts Work At the Edge of Wonder Atkins Sally Heftet / 2014 / Engelsk
