Wrightsman, Lawrence S.
Brooks/Cole , 1998
Buku Teks
Brennan, James F.
Prentice-Hall, 1991
Buku Teks
Shneiderman, Ben
Massachusetts Winthrop Publishers, 1980
Buku Teks
Brennan, James F.
RajaGrafindo Persada, 2006
Buku Teks
Olds, Linda E.
State University of New York Press, 1992
Buku Teks