Le Roy, Michael K., author
Wadsworth and Cengage Learning, 2013
Buku Teks
edited by Steven H. Chaffee
Sage, 1975
Buku Teks
McClosky, Herbert, author
Macmillan, 1969
Buku Teks
Reynolds, John C., author
Prentice-Hall, 1978
Buku Teks
O`Keefe, Richard A., author
MIT Press, 1990
Buku Teks