Wynn, Thomas Grant, author
Oxford University Press, 2016
eBooks
Feder, Kenneth L.
Mayfield Publishing Company, 1997
Buku Teks
Cambridge University Press, 2009
eBooks
edited by George Houghton
Psychology Press, 2005
Buku Teks
by Rob Ranyard [and others]; edited by Rob Ranyard, W. Ray Crozier and Ola Svenson
Routledge , 1997
Buku Teks