Santrock, John W.
Children
McGraw-Hill, 2003
 Buku Teks SO
Roberts, Ann
Helping children to be strong from birth to three
Routledge, 2007
 Buku Teks SO
Santrock, John W.
Children
2003
 Multimedia
Cobb, Nancy J.
The Child : Irfants, children, and adolesents
Mayfield Publishing Company , 2001
 Buku Teks SO
Singer, Hans W. (Hans Wolfgang)
Children in the strategy of development
United Nations, 1972
 Buku Teks SO