Michael Beveridge, editor
Routledge, 2001
Buku Teks
William Damon, editor-in-chief
John Wiley & Sons, 1998
Buku Referensi
Ahern, Charles A.
Springer, 2011
eBooks
Omrod, Jeanne Ellis
Pearson Education, Inc., 2009
Buku Teks
Hilgard, Ernest R. (Ernest Ropiequet), 1904-2001
Prentice-Hall, 1975
Buku Teks