Fox, William
MicroCase Coorporation, 1995
Buku Teks
Hoel, Paul Gerhard, 1905-, author
John Wiley & Sons, 1962
Buku Teks
Hansen, Kermit O., author
Prentice-Hall, 1955
Buku Teks
Andrews, Frank M.
University of Michigan, 1981
Buku Teks
Krieg, Eric J., author
Pearson, 2014
Buku Teks