Medin, Douglas L., author
Harcourt Brace Jovanovich College, 1991
Buku Teks
Rich, Anne J., author
Harcourt Brace Jovanovich, 1991
Buku Teks
Santrock, John W.
McGaw-Hill, 2005
Multimedia
Walstad, William B., author
McGraw-Hill, 2002
Buku Teks
Henderson, Glenn V., author
Addison-Wesley, 1984
Buku Teks