Katz, Alfred H., author
Third Party Publishing, 1990
Buku Teks
Haney, Hutch, author
Brooks/Cole, 2001
Buku Teks
Haney, James Hutchinson, author
Brooks/Cole Thomson Learning, 2001
Multimedia
Baldwin, Robert E., author
Harvester/Wheatsheaf, 1988
Buku Teks
Miles, Matthew B., author
Teacher College Columbia Univ., 1981
Buku Teks