Conn, Steven, author
University of Pennsylvania Press, 2003
Buku Teks
Ballast, David Kent, author
Professional Publications, 1999
Buku Teks
Harris, Neil
Yale University Press, 1999
Buku Teks
Andrews, Wayne
Macmillan, 1978
Buku Teks
Ohara, Steven E.
Professional Publications, 2002
Buku Teks