Billsberry, Jon., author
John Wiley & Sons, 2007
Buku Teks
Dale, Margaret, author
Crest Publishing House, 2001
Buku Teks
Dale, Margaret, author
Gramedia, 2003
Buku Teks
Ioannis Nikolaou and Janneke K. Oostrom, edited
Psychology Press, 2015
Buku Teks
Dale, Margaret, author
Gramedia, 2003
Buku Teks