Martin, David, author
Routledge, 1996
Buku Teks
Martin, David, author
Routledge , 1996
Buku Teks
DeMers, Michael N.
John Wiley & Sons, 1997
Buku Teks
editor, Wolfgang Kresse, David M. Danko
Springer, 2012
eBooks
Clarke, Keith C.
Prentice-Hall, 1999
Buku Teks