Santrock, John W., author
McGraw-Hill, 2007
Buku Teks
William Damon, editor-in-chief
John Wiley & Sons, 1998
Buku Referensi
William Damon, editor-in-chief
John Wiley & Sons, 1998
Buku Referensi
New York, 1993
Buku Teks
Davies, Douglas, 1942-, author
The Guilford Press, 2004
Buku Teks