edited by Nitin Indurkhya; Fred J. Damerau
CRC Press, 2010
Buku Teks
edited by Alexander Clark, Chris Fox and Shalom Lappin
Wiley-Blackwell, 2013
Buku Teks SO
Allen, James
The Benjamin Cumming Pub. Co., 1987
Buku Teks
Lyons, John
Cambridge University Press, 1991
eBooks
Krulee, Gilbert K.
Prentice-Hall, 1991
Buku Teks SO