Curley, Anthony J.
Harper & Row , 1979
Buku Teks
Reilly, Frank K., author
The Dryden Press, 1994
Buku Teks
Radcliffe, Robert C.
Addison-Wesley, 1997
Buku Teks
Wendt, Paul F.
The University of California, 1966
Buku Teks
Amling, Frederick, author
Prentice-Hall, 1978
Buku Teks