Curtis, Donnelyn, author
Facet, 2005
Buku Teks
Patrick, Gay D., author
Neal-Schuman, 1992
Buku Referensi
Curzon, Susan Carol, author
Facet Publishing, 2006
Buku Teks
Clayton, Peter, author
Facet Publishing, 2006
Buku Teks
Tennant, Roy, author
Reed Press, 2004
Buku Teks