Bart, Pauline
Random House, 1986
Buku Teks
New York : The American College
Majalah, Jurnal, Buletin
edited by Mary Abbott
Routledge, 1996
Buku Teks
Sandra L. Christenson, Amy L. Reschly, Cathy Wylie, editors
[Springer, ], 2012
eBooks
Eysenck, Michael W., author
Psychology Press, 1995
Buku Referensi