Ulbrich, Holley H., author
Barrons, 1990
Buku Teks
Salvatore, Dominick, author
Salemba Empat, 2005
Buku Teks
Ulbrich, Holley H., author
Buku Teks
Pappas, James L., author
The Dryden Press, 1990
Buku Teks
Samuelson, William F., author
Driden Press, 1999
Buku Teks