Wolman, Yecheskel
John Wiley & Sons, 1983
Buku Teks SO
Yerbury, Hilary
University of Technology, 1992
Buku Referensi
Brown, Adrian
Facet Publishing, 2006
Buku Teks SO
Parker, Christopher Charles
Butterworths, 1986
Buku Teks
Smith, Martin
McGraw-Hill, 1993
Buku Teks SO