Papalia, Diane E.
Perkembangan manusia; Buku 2 = Human development
Salemba Empat, 2009
 Buku Teks SO
The blackwell handbook of early childhood development
Kathleen McCartnet; Deborah Phillips
Blackwell, 2006
 Buku Teks
Keenan, Thomas
An introduction to child development
Sage Publications, 2004
 Buku Teks
The Child as psychologist : an introduction to the development of social cognition
edited by Mark Bennett
Harvester Wheatsheaf, 1993
 Buku Teks SO
Santrock, John W.
Child development
McGraw-Hill, 2001
 Buku Teks SO