Wagner, William E., author
Pine Forge Press, 2007
Buku Teks
Field, Andy P, author
Sage Publications, 2018
Buku Teks
Rasch, Dieter, author
John Wiley & Sons, 2011
Buku Teks
Coolican, Hugh, author
Hodder & Stoughton, 2009
Buku Teks
Coolican, Hugh, author
Psychology Press, 2014
Buku Teks