Petruzella, Frank D., author
McGraw-Hill, 1996
Buku Teks
Humphries, James T., author
Breton Publishers, 1983
Buku Teks
Humphries, James T., author
Delmar Publisher, 1993
Buku Teks
Simpson, Colin D., author
Prentice-Hall, 1996
Buku Teks
Kissell, Thomas E.
Prentice Hall International, 1997
Buku Teks