Handbook of child psychology : volume 2, cognition, perseption, and language
William Damon, editor-in-chief
John Wiley & Sons, 1998
 Buku Referensi
Developmental psychology
American Psychological Assosiation, 2001
 Majalah, Jurnal, Buletin
Strommen, Ellen A.
Developmental psychology
Dorsey Press, 1983
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Fitagerald, Hiram E
Developmental psychology
0, 1982
 Buku Teks
Liebert, Robert M., 1942-
Developmental psychology
Prentice-Hall, 1986
 Buku Teks SO