Garry L. Landreth, EdD, LPC, RPT-S, is regents professor emeritus, department of counseling and higher education, and founder and director emeritus, Center for Play Therapy at the University of North Texas.

Sue C. Bratton, PhD, LPC-S, RPT-S, is professor emerita, department of counseling and higher education, and director emerita, Center for Play Therapy at the University of North Texas.