Rich, Anne J.
Harcourt Brace Jovanovich, Pub. , 1991
Buku Teks
Santrock, John W.
McGaw-Hill, 2005
Multimedia
Walstad, William B.
McGraw-Hill, 2002
Buku Teks
Henderson, Glenn V.
Addison-Wesley, 1984
Buku Teks
Niles Christensen [and others]
Illinois Scott, Foresman , 1984
Buku Teks