Yoffie, David B.
McGraw-Hill , 1994
Buku Teks
Daniels, John D., author
Addison-Wesley, 1982
Buku Teks
Daniels, John D., author
Addison-Wesley, 1994
Buku Teks
Salvatore, Dominick, author
Macmillan, 1993
Buku Teks
Salvatore, Dominick, author
Prentice-Hall, 1998
Buku Teks