Spiegel, Leonard
Regents, 1993
Buku Teks SO
Mahmoud, Magdi S.
Springer-Verlag, 2012
eBooks
Fleming, John F.
Prentice-Hall International, 1997
Buku Teks
Gheorghe, Adrian
John Wiley & Sons, 1982
Buku Teks SO
Butler, Robert Brown
McGraw-Hill , 2002
Buku Teks SO