Covert, Jack, author
Ufuk PressTood Satterten , 2009
Buku Teks
Nespeca, Sue McCleaf, author
[American Library association, ], 2003
eBooks
Thesis: Jurnal Penelitian Ilmu Komunikasi, V (3) September-Desember 2006: 1-29, 2006
Artikel Jurnal
edited by Holly Koelling
American Library association, 2007
eBooks
Rogak, Lisa, author
Gramedia, 2006.
Buku Teks