Cilukba: Perbedaan antara revisi

* {{Cite book|last=Bruner|first=J. S.|last-author-amp=yes|last2=Sherwood|first2=V.|year=1976|chapter=Peek-a-boo and the learning of rule structures|editor-last=Bruner|editor-first2=A.|editor-last2=Jolly|editor-first3=K.|editor-last3=Sylva|title=Play: Its Role in Development and Evolution|url=https://archive.org/details/playitsroleindev0000unse_k2g4|pages=277–287[https://archive.org/details/playitsroleindev0000unse_k2g4/page/n278 277]–287|location=Middlesex|publisher=Penguin|isbn=0-14-081126-5}}