Allen, Lynne, author
Rockport, 1997
Buku Teks
Codling, Sylvia
Texas Gulf Publishing , 1996
Buku Teks
Codline, Sylvia
Gulf Publishing Company, 1992
Buku Teks
Sullivan, Terry, author
Rockport, 1999
Buku Teks
Sara Holder by editor
Information Science Reference, 2013
Buku Teks