Francois, William E.
Grid Inc., 1977
Buku Teks
Agee, Warren Kendall, editor
1982
Buku Teks
Emery, Edwin, editor
Dood, Mead & Company, 1971
Buku Teks
edited by Warren K. Agee, Phillip H. Ault, Edwin Emery
Harper and Row, 1982
Buku Teks
edited by Wilbur Schramm
University of Illnois Press, 1954
Buku Teks