IOS, 1989
Buku Teks
by Lawrence Snyder, Leah H. Jamieson, Dennis B. Gannon and Howard Siege
Academic Press, 1985
Buku Teks
Morse, Stephen A.
Prentice-Hall, 1998
Buku Teks
Choudhary, Alok Nidhi, 1961
Kluwer, 1990
Buku Teks
Calvez, Jean Paul
John Wiley & Sons, 1993
Buku Teks SO