http://www.genbilim.com/content/view/5977/37/
http://www.ankaracocukpsikologu.com/?pnum=7&pt=%C3%87ocu%C4%9Funuzun%20Bili%C5%9Fsel%20Geli%C5%9Fimi
http://yasamrehberlik.blogspot.com/2009/01/bilisel-geliim-kurami-piaget-konunun.html
http://www.kpssrehber.com/dersnotu-68-piagete-gore-bilissel-gelisim.html