Wigand, Molly, author
Writer's Digest Books, 1992
Buku Teks
Newstrom, John W., author
McGraw-Hill, 1997
Buku Teks
Molotch, Harvey, author
Routledge, 2003
Buku Teks
Berry, Ralph, author
Routledge, 1994
Buku Teks
Purves, Alan C. (Alan Carroll), 1931-1996, author
Harcourt Brace Jovanovich, 1984
Buku Teks