Kaplan, Eugene H., author
Macmillan, 1976
Buku Teks
Robertson, S. Ian, author
Psychology Press, 2001
Buku Teks
Eide, Arvid R., author
McGraw-Hill, 2002
Buku Teks
Fogler, H. Scott, author
Prentice-Hall, 2008
Buku Teks
edited by Janet Davidson, Robert J. Sternberg
Cambridge university , 2003
Buku Teks