Nadelman, Lorraine, author
Lawrence Erlbaum, 2004
Buku Teks
Santrock, John W., author
McGraw-Hill, 2001
Buku Teks SO
Keenan, Thomas, author
Sage Publications, 2004
Buku Teks
edited by Mark Bennett
Harvester Wheatsheaf, 1993
Buku Teks SO
Santrock, John W., author
McGraw-Hill, 1998
Buku Teks SO