Voices of modern psychology
Addison Wesley Publishing Company, 0
 Buku Teks
Lucas, Bill
Power up your mind: learn faster, work smarter
Nicholas Brealey Publishing, 2002
 Buku Teks SO
Developmental psychology
American Psychological Assosiation, 2001
 Majalah, Jurnal, Buletin
Fitagerald, Hiram E
Developmental psychology
0, 1982
 Buku Teks
Liebert, Robert M., 1942-
Developmental psychology
Prentice-Hall, 1986
 Buku Teks SO