The efficacy of systemic therapy for internalizing and other disorders of childhood and adolescence: A systematic review of 38 randomized trials
Retzlaff, Ruediger, et al. Family Process 52.4 (2013): 619-652.
This article offers an excellent summary of the evidence base regarding family therapy interventions treating internalizing disorders in children and adolescents. There is a similar article by Sydow et al. regarding the value of these interventions for externalizing disorders.