Littlejohn, Stephen W, author
Thomson, 2005
Buku Teks
Beamer, Linda, author
McGraw-Hill, 2008
Buku Teks
Crable, Richard E.
Charles E. Merrill, 1976
Buku Teks
Tubbs, Stewart L., author
McGraw-Hill, 2008
Buku Teks
Fiske, John, author
Routledge, 1997
Buku Teks