Patrick, Gay D., author
Neal-Schuman, 1992
Buku Referensi
Sauers, Michael P., author
Library Association Publishing, 2001
Buku Teks
Stielow, Frederick, author
Neal-Schuman, 2003
Buku Teks
Stein, Barbara L., author
Neal-Schuman, 1992
Buku Referensi
Curzon, Susan Carol, author
Facet Publishing, 2006
Buku Teks