Ford, Andrew
Island Press, 1999
Buku Teks
Luenberger, David G.
John Wiley & Sons, 1979
Buku Teks
Deaton, Michael L., author
Springer, 2000
Buku Teks
Shearer, J. Lowen, author
Addison-Wesley, 1971
Buku Teks
Rosenberg, Ronald C., author
McGraw-Hill, 1983
Buku Teks