Connelly, J. Alvin
Prentice-Hall, 1992
Buku Teks
Tuinenga, Paul W., author
Prentice-Hall, 1995
Buku Referensi
Benzhaf, Walter
Prentice-Hall, 1989
Buku Teks
Conant, Roger, author
McGraw-Hill, 1993
Buku Teks
Pillage, Lawrence T., author
McGraw-Hill , 1995
Buku Teks