edited by Rachel Brown-Chidsey
Guildford Press, 2005
Buku Teks
Hoover, Stewart V.
Addison-Wesley, 1990
Buku Teks
Laudon, Kenneth C., 1944-
The Dryden Press , 1995
Buku Teks
Smith, Marilyn Z.
Houghton-Mifflin, 1974
Buku Teks
Keedy, Mervin L.
Addison-Wesley, 1986
Buku Teks