Winston, Robert ML
BBC Worldwide Limited, 2004
Multimedia
Blank, Warren, author
[American Management Association, ], 2001
eBooks
Cartairs, G. Morris, author
The Hogarth Press, 1970
Buku Teks
Shefsky, Lloyod E.
McGraw-Hill, 1994
Buku Teks
Zed Press, 1981
Buku Teks