http://books.google.co.id/books?hl=en&id=93rZUda3yxcC&dq=research+play+therapy&printsec=frontcover&source=web&ots=lyxlC6O-GR&sig=6SJ_GSfUNzKHrY0iggrZF0AdU88&sa=X&oi=book_result&resnum=1&ct=result#PPA2,M1
http://books.google.co.id/books?id=CAAu6e3MvzQC&pg=PA141&lpg=PA141&dq=research+play+therapy&source=web&ots=kqhbjEURze&sig=x4rzN898izwIXvonTV2-FOCRsZc&hl=en&sa=X&oi=book_result&resnum=7&ct=result#PPA142,M1
http://en.wikipedia.org/wiki/Play_therapy
http://www.a4pt.org/
http://www.a4pt.org/download.cfm?ID=10935
http://www.ericdigests.org/2000-1/play.html
http://www.ipt-forensics.com/journal/volume4/j4_3_1.htm
http://www.minddisorders.com/Ob-Ps/Play-therapy.html
http://www.playtherapy.org.uk/News/News1.htm
http://www.playtherapyforchildren.com/
http://www.questia.com/library/psychology/play-therapy.jsp
http://www.rch.org.au/ept/projects/index.cfm?doc_id=1227

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