Indonesia National Development Information Office, 1996
Buku Teks
Krichene, Noureddine
John Wiley & Sons, 2013
Buku Teks SO
Jensen, Michael C.
Praeger, 1972
Buku Teks SO
edited by G. William Schwert, Clifford W. Smith, Jr.
McGraw-Hill, 1992
Buku Teks SO
Fabozzi, Frank J.
Prentice Hall International, 1996
Buku Teks SO