Cohn, John M., author
Neal-Schuman, 2001
Buku Teks
Cohn, John M., author
Facet Publishing, 2002
Buku Teks
Curzon, Susan Carol, author
Facet Publishing, 2006
Buku Teks
Turock, Betty J., author
Neal-Schuman Publishers, 1992
Buku Teks
Newlen, Robert R., author
Neal-Schuman Publishers, 2006
Buku Teks