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by Heilbrun, Kirk; Marczyk, Geoffrey; DeMatteo, David
by Marczyk, Geoffrey R.; DeMatteo, David; Festinger, David
by Marczyk, Geoffrey R.; Dematteo, David; Festinger, David
by Geoffrey R. Marczyk (Director of the Psy.D./MBA and Psy.D./M.A. in Criminal Justice programs at Widener University, Philadelphia, PA); David DeMatteo (University of Pennsylvania, Philadelphia, PA); David Festinger (Treatment Research Institute of the