Eysenck, Michael W., author
Psychology Press, 1995
Buku Referensi
Anderson, John R., author
N.Y. Worth, 2015
Buku Teks
Hunt, R. Reed, author
McGraw-Hill, 1999
Buku Teks
Goldstein, E. Bruce, author
Thomson Wadsworth, 2005
Buku Teks
Flavell, John H., author
Prentice-Hall, 1993
Buku Teks