Shaeffer, R.E., author
Prentice-Hall, 1980
Buku Teks
Vazirani, V.N., author
Khanna Publishers, 1979
Buku Teks
Ghali, A., author
Chapman and Hall , 1978
Buku Teks
Smith, Bryan Stafford, author
John Wiley & Sons, 1991
Buku Teks
Schucller, Wolfgang, author
Prentice-Hall, 1996
Buku Teks