In 1997, Cathy Malchiodi published a book: “Breaking the Silence: Art Therapy with Children from Violence Homes”
Published by Brunner/Mazel
This is a seminal resource for art therapists working with children from violent homes. Cathy writes specifically on issues inherent on working with children in shelters and issues specific to therapists trying to work in shelters. Her book is comprehensive in it focus on all aspects of working with children of violence: assessment, clinical work, developing programs, qualifications of art therapists, and policy.
This is one of the books I use as a resource for students learning in my rape crisis center.