Arid, S.,Card, C. A.,Tyano, S.(1985).Uses of children`s make-believe play in family therapy: Theory and clinical examples.Journal of Marital and Family Therapy.11(1),47-60.
Berckelaer-Onnes, Ina van,Rimmert van der Kooij,J. Hellendoorn (Eds)(1986).Different play in different children: Implication for treatment.Play, play therapy, play research. Proceedings of the international symposium.133-144.