Addison-wesley, 1982
Buku Teks
Dye, Thomas R., author
Prentice_Hall, Inc, 1988
Buku Teks
Bingham, Richard D., author
McGraw-Hill, 1991
Buku Teks
Saffell, David C.
McGraw-Hill, 1997
Buku Teks
Holloway, William Vernon, author
McGraw-Hill , 1951
Buku Teks