Sutton, Mark Q., author
Routledge, 2016
Buku Teks
Reeves, T. Zane, author
Wadsworth, 2006
Buku Teks
McClam, Tricia, author
Thomson Brooks/Cole, 2005
Buku Teks
Dubin, Robert, author
Prentice-Hall, 1962
Buku Teks
Saltonstall, Robert, author
McGraw-Hill, 1959
Buku Teks