Dorf, Richard C.
Wiley, 1994
Buku Referensi
Clayton, Marlene, author
Ashgate, 1992
Buku Referensi
Springer, 2009
Multimedia
Nicholas D. Adams, Terry W. Brown, Rowland V. D. Firth, Laura P. Misenheimer, editor
McGraw-Hill, 1996
Buku Referensi
editor, Roelof Hamberg, Jacques Verriet
Springer-Verlag, 2012
eBooks