Kachigan, Sam Kash
Radius Press, 1991
Buku Teks SO
Hardle, Wolfgang Karl
Springer, 2012
eBooks
Johnson, Richard A.
Pearson Education International, 2007
Buku Teks SO
Raykov, Tenko
Routledge, Taylor & Francis Group, 2008
Buku Teks SO
Gnanadesikan, Ram, 1932-
John Wiley & Sons, 1977
Buku Teks SO